1 /* TILE-Gx-specific support for ELF.
2 Copyright (C) 2011-2021 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/tilegx.h"
26 #include "opcode/tilegx.h"
27 #include "libiberty.h"
28 #include "elfxx-tilegx.h"
29
30 #define ABI_64_P(abfd) \
31 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
32
33 #define TILEGX_ELF_WORD_BYTES(htab) \
34 ((htab)->bytes_per_word)
35
36 /* The size of an external RELA relocation. */
37 #define TILEGX_ELF_RELA_BYTES(htab) \
38 ((htab)->bytes_per_rela)
39
40 /* Both 32-bit and 64-bit tilegx encode this in an identical manner,
41 so just take advantage of that. */
42 #define TILEGX_ELF_R_TYPE(r_info) \
43 ((r_info) & 0xFF)
44
45 #define TILEGX_ELF_R_INFO(htab, in_rel, index, type) \
46 ((htab)->r_info (in_rel, index, type))
47
48 #define TILEGX_ELF_R_SYMNDX(htab, r_info) \
49 ((htab)->r_symndx(r_info))
50
51 #define TILEGX_ELF_DTPOFF_RELOC(htab) \
52 ((htab)->dtpoff_reloc)
53
54 #define TILEGX_ELF_DTPMOD_RELOC(htab) \
55 ((htab)->dtpmod_reloc)
56
57 #define TILEGX_ELF_TPOFF_RELOC(htab) \
58 ((htab)->tpoff_reloc)
59
60 #define TILEGX_ELF_PUT_WORD(htab, bfd, val, ptr) \
61 ((htab)->put_word (bfd, val, ptr))
62
63 /* The name of the dynamic interpreter. This is put in the .interp
64 section. */
65
66 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld.so.1"
67 #define ELF32_DYNAMIC_INTERPRETER "/lib32/ld.so.1"
68
69
70 static reloc_howto_type tilegx_elf_howto_table [] =
71 {
72 /* This reloc does nothing. */
73 HOWTO (R_TILEGX_NONE, /* type */
74 0, /* rightshift */
75 3, /* size (0 = byte, 1 = short, 2 = long) */
76 0, /* bitsize */
77 false, /* pc_relative */
78 0, /* bitpos */
79 complain_overflow_dont, /* complain_on_overflow */
80 bfd_elf_generic_reloc, /* special_function */
81 "R_TILEGX_NONE", /* name */
82 false, /* partial_inplace */
83 0, /* src_mask */
84 0, /* dst_mask */
85 false), /* pcrel_offset */
86 #ifdef BFD64
87 /* A 64 bit absolute relocation. */
88 HOWTO (R_TILEGX_64, /* type */
89 0, /* rightshift */
90 4, /* size (0 = byte, 1 = short, 2 = long) */
91 64, /* bitsize */
92 false, /* pc_relative */
93 0, /* bitpos */
94 complain_overflow_dont, /* complain_on_overflow */
95 bfd_elf_generic_reloc, /* special_function */
96 "R_TILEGX_64", /* name */
97 false, /* partial_inplace */
98 0, /* src_mask */
99 0xffffffffffffffffULL, /* dst_mask */
100 false), /* pcrel_offset */
101 #endif
102 /* A 32 bit absolute relocation. */
103 HOWTO (R_TILEGX_32, /* type */
104 0, /* rightshift */
105 2, /* size (0 = byte, 1 = short, 2 = long) */
106 32, /* bitsize */
107 false, /* pc_relative */
108 0, /* bitpos */
109 complain_overflow_dont, /* complain_on_overflow */
110 bfd_elf_generic_reloc, /* special_function */
111 "R_TILEGX_32", /* name */
112 false, /* partial_inplace */
113 0, /* src_mask */
114 0xffffffff, /* dst_mask */
115 false), /* pcrel_offset */
116
117 /* A 16 bit absolute relocation. */
118 HOWTO (R_TILEGX_16, /* type */
119 0, /* rightshift */
120 1, /* size (0 = byte, 1 = short, 2 = long) */
121 16, /* bitsize */
122 false, /* pc_relative */
123 0, /* bitpos */
124 complain_overflow_bitfield, /* complain_on_overflow */
125 bfd_elf_generic_reloc, /* special_function */
126 "R_TILEGX_16", /* name */
127 false, /* partial_inplace */
128 0, /* src_mask */
129 0xffff, /* dst_mask */
130 false), /* pcrel_offset */
131
132 /* An 8 bit absolute relocation. */
133 HOWTO (R_TILEGX_8, /* type */
134 0, /* rightshift */
135 0, /* size (0 = byte, 1 = short, 2 = long) */
136 8, /* bitsize */
137 false, /* pc_relative */
138 0, /* bitpos */
139 complain_overflow_unsigned, /* complain_on_overflow */
140 bfd_elf_generic_reloc, /* special_function */
141 "R_TILEGX_8", /* name */
142 false, /* partial_inplace */
143 0, /* src_mask */
144 0xff, /* dst_mask */
145 false), /* pcrel_offset */
146 #ifdef BFD64
147 /* A 64 bit pc-relative relocation. */
148 HOWTO (R_TILEGX_64_PCREL,/* type */
149 0, /* rightshift */
150 4, /* size (0 = byte, 1 = short, 2 = long) */
151 64, /* bitsize */
152 true, /* pc_relative */
153 0, /* bitpos */
154 complain_overflow_dont, /* complain_on_overflow */
155 bfd_elf_generic_reloc, /* special_function */
156 "R_TILEGX_32_PCREL", /* name */
157 false, /* partial_inplace */
158 0, /* src_mask */
159 0xffffffffffffffffULL, /* dst_mask */
160 true), /* pcrel_offset */
161 #endif
162 /* A 32 bit pc-relative relocation. */
163 HOWTO (R_TILEGX_32_PCREL,/* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 true, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_dont, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_TILEGX_32_PCREL", /* name */
172 false, /* partial_inplace */
173 0, /* src_mask */
174 0xffffffff, /* dst_mask */
175 true), /* pcrel_offset */
176
177 /* A 16 bit pc-relative relocation. */
178 HOWTO (R_TILEGX_16_PCREL,/* type */
179 0, /* rightshift */
180 1, /* size (0 = byte, 1 = short, 2 = long) */
181 16, /* bitsize */
182 true, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_signed, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_TILEGX_16_PCREL", /* name */
187 false, /* partial_inplace */
188 0, /* src_mask */
189 0xffff, /* dst_mask */
190 true), /* pcrel_offset */
191
192 /* An 8 bit pc-relative relocation. */
193 HOWTO (R_TILEGX_8_PCREL, /* type */
194 0, /* rightshift */
195 0, /* size (0 = byte, 1 = short, 2 = long) */
196 8, /* bitsize */
197 true, /* pc_relative */
198 0, /* bitpos */
199 complain_overflow_signed, /* complain_on_overflow */
200 bfd_elf_generic_reloc, /* special_function */
201 "R_TILEGX_8_PCREL",/* name */
202 false, /* partial_inplace */
203 0, /* src_mask */
204 0xff, /* dst_mask */
205 true), /* pcrel_offset */
206
207 /* A 16 bit relocation without overflow. */
208 HOWTO (R_TILEGX_HW0, /* type */
209 0, /* rightshift */
210 1, /* size (0 = byte, 1 = short, 2 = long) */
211 16, /* bitsize */
212 false, /* pc_relative */
213 0, /* bitpos */
214 complain_overflow_dont,/* complain_on_overflow */
215 bfd_elf_generic_reloc, /* special_function */
216 "R_TILEGX_HW0", /* name */
217 false, /* partial_inplace */
218 0, /* src_mask */
219 0xffff, /* dst_mask */
220 false), /* pcrel_offset */
221
222 /* A 16 bit relocation without overflow. */
223 HOWTO (R_TILEGX_HW1, /* type */
224 16, /* rightshift */
225 1, /* size (0 = byte, 1 = short, 2 = long) */
226 16, /* bitsize */
227 false, /* pc_relative */
228 0, /* bitpos */
229 complain_overflow_dont,/* complain_on_overflow */
230 bfd_elf_generic_reloc, /* special_function */
231 "R_TILEGX_HW1", /* name */
232 false, /* partial_inplace */
233 0, /* src_mask */
234 0xffff, /* dst_mask */
235 false), /* pcrel_offset */
236
237 /* A 16 bit relocation without overflow. */
238 HOWTO (R_TILEGX_HW2, /* type */
239 32, /* rightshift */
240 1, /* size (0 = byte, 1 = short, 2 = long) */
241 16, /* bitsize */
242 false, /* pc_relative */
243 0, /* bitpos */
244 complain_overflow_dont,/* complain_on_overflow */
245 bfd_elf_generic_reloc, /* special_function */
246 "R_TILEGX_HW2", /* name */
247 false, /* partial_inplace */
248 0, /* src_mask */
249 0xffff, /* dst_mask */
250 false), /* pcrel_offset */
251
252 /* A 16 bit relocation without overflow. */
253 HOWTO (R_TILEGX_HW3, /* type */
254 48, /* rightshift */
255 1, /* size (0 = byte, 1 = short, 2 = long) */
256 16, /* bitsize */
257 false, /* pc_relative */
258 0, /* bitpos */
259 complain_overflow_dont,/* complain_on_overflow */
260 bfd_elf_generic_reloc, /* special_function */
261 "R_TILEGX_HW3", /* name */
262 false, /* partial_inplace */
263 0, /* src_mask */
264 0xffff, /* dst_mask */
265 false), /* pcrel_offset */
266
267 /* A 16 bit relocation with overflow. */
268 HOWTO (R_TILEGX_HW0_LAST, /* type */
269 0, /* rightshift */
270 1, /* size (0 = byte, 1 = short, 2 = long) */
271 16, /* bitsize */
272 false, /* pc_relative */
273 0, /* bitpos */
274 complain_overflow_signed,/* complain_on_overflow */
275 bfd_elf_generic_reloc, /* special_function */
276 "R_TILEGX_HW0_LAST", /* name */
277 false, /* partial_inplace */
278 0, /* src_mask */
279 0xffff, /* dst_mask */
280 false), /* pcrel_offset */
281
282 /* A 16 bit relocation with overflow. */
283 HOWTO (R_TILEGX_HW1_LAST, /* type */
284 16, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 false, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_signed,/* complain_on_overflow */
290 bfd_elf_generic_reloc, /* special_function */
291 "R_TILEGX_HW1_LAST", /* name */
292 false, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 false), /* pcrel_offset */
296
297 /* A 16 bit relocation with overflow. */
298 HOWTO (R_TILEGX_HW2_LAST, /* type */
299 32, /* rightshift */
300 1, /* size (0 = byte, 1 = short, 2 = long) */
301 16, /* bitsize */
302 false, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_signed,/* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_TILEGX_HW2_LAST", /* name */
307 false, /* partial_inplace */
308 0, /* src_mask */
309 0xffff, /* dst_mask */
310 false), /* pcrel_offset */
311
312 HOWTO (R_TILEGX_COPY, /* type */
313 0, /* rightshift */
314 0, /* size (0 = byte, 1 = short, 2 = long) */
315 0, /* bitsize */
316 false, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_dont, /* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_TILEGX_COPY", /* name */
321 false, /* partial_inplace */
322 0, /* src_mask */
323 0, /* dst_mask */
324 true), /* pcrel_offset */
325
326 HOWTO (R_TILEGX_GLOB_DAT, /* type */
327 0, /* rightshift */
328 0, /* size (0 = byte, 1 = short, 2 = long) */
329 0, /* bitsize */
330 false, /* pc_relative */
331 0, /* bitpos */
332 complain_overflow_dont, /* complain_on_overflow */
333 bfd_elf_generic_reloc, /* special_function */
334 "R_TILEGX_GLOB_DAT", /* name */
335 false, /* partial_inplace */
336 0, /* src_mask */
337 0, /* dst_mask */
338 true), /* pcrel_offset */
339
340 HOWTO (R_TILEGX_JMP_SLOT, /* type */
341 0, /* rightshift */
342 0, /* size (0 = byte, 1 = short, 2 = long) */
343 0, /* bitsize */
344 false, /* pc_relative */
345 0, /* bitpos */
346 complain_overflow_dont, /* complain_on_overflow */
347 bfd_elf_generic_reloc, /* special_function */
348 "R_TILEGX_JMP_SLOT", /* name */
349 false, /* partial_inplace */
350 0, /* src_mask */
351 0, /* dst_mask */
352 true), /* pcrel_offset */
353
354 HOWTO (R_TILEGX_RELATIVE, /* type */
355 0, /* rightshift */
356 0, /* size (0 = byte, 1 = short, 2 = long) */
357 0, /* bitsize */
358 false, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_dont, /* complain_on_overflow */
361 bfd_elf_generic_reloc, /* special_function */
362 "R_TILEGX_RELATIVE", /* name */
363 false, /* partial_inplace */
364 0, /* src_mask */
365 0, /* dst_mask */
366 true), /* pcrel_offset */
367
368 HOWTO (R_TILEGX_BROFF_X1, /* type */
369 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */
370 2, /* size (0 = byte, 1 = short, 2 = long) */
371 17, /* bitsize */
372 true, /* pc_relative */
373 0, /* bitpos */
374 complain_overflow_signed, /* complain_on_overflow */
375 bfd_elf_generic_reloc, /* special_function */
376 "R_TILEGX_BROFF_X1", /* name */
377 false, /* partial_inplace */
378 0, /* src_mask */
379 -1, /* dst_mask */
380 true), /* pcrel_offset */
381
382 HOWTO (R_TILEGX_JUMPOFF_X1, /* type */
383 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */
384 2, /* size (0 = byte, 1 = short, 2 = long) */
385 27, /* bitsize */
386 true, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_signed,/* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_TILEGX_JUMPOFF_X1", /* name */
391 false, /* partial_inplace */
392 0, /* src_mask */
393 -1, /* dst_mask */
394 true), /* pcrel_offset */
395
396 HOWTO (R_TILEGX_JUMPOFF_X1_PLT, /* type */
397 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */
398 2, /* size (0 = byte, 1 = short, 2 = long) */
399 27, /* bitsize */
400 true, /* pc_relative */
401 0, /* bitpos */
402 complain_overflow_signed,/* complain_on_overflow */
403 bfd_elf_generic_reloc, /* special_function */
404 "R_TILEGX_JUMPOFF_X1_PLT", /* name */
405 false, /* partial_inplace */
406 0, /* src_mask */
407 -1, /* dst_mask */
408 true), /* pcrel_offset */
409
410 #define TILEGX_IMM_HOWTO(name, size, bitsize) \
411 HOWTO (name, 0, size, bitsize, false, 0, \
412 complain_overflow_signed, bfd_elf_generic_reloc, \
413 #name, false, 0, -1, false)
414
415 #define TILEGX_UIMM_HOWTO(name, size, bitsize) \
416 HOWTO (name, 0, size, bitsize, false, 0, \
417 complain_overflow_unsigned, bfd_elf_generic_reloc, \
418 #name, false, 0, -1, false)
419
420 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X0, 0, 8),
421 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0, 0, 8),
422 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1, 0, 8),
423 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1, 0, 8),
424 TILEGX_IMM_HOWTO(R_TILEGX_DEST_IMM8_X1, 0, 8),
425
426 TILEGX_UIMM_HOWTO(R_TILEGX_MT_IMM14_X1, 1, 14),
427 TILEGX_UIMM_HOWTO(R_TILEGX_MF_IMM14_X1, 1, 14),
428
429 TILEGX_UIMM_HOWTO(R_TILEGX_MMSTART_X0, 0, 6),
430 TILEGX_UIMM_HOWTO(R_TILEGX_MMEND_X0, 0, 6),
431
432 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_X0, 0, 6),
433 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_X1, 0, 6),
434 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_Y0, 0, 6),
435 TILEGX_UIMM_HOWTO(R_TILEGX_SHAMT_Y1, 0, 6),
436
437 #define TILEGX_IMM16_HOWTO(name, rshift) \
438 HOWTO (name, rshift, 1, 16, false, 0, \
439 complain_overflow_dont, bfd_elf_generic_reloc, \
440 #name, false, 0, 0xffff, false)
441
442 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0, 0),
443 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0, 0),
444 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW1, 16),
445 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW1, 16),
446 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW2, 32),
447 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW2, 32),
448 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW3, 48),
449 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW3, 48),
450
451 #define TILEGX_IMM16_HOWTO_LAST(name, rshift) \
452 HOWTO (name, rshift, 1, 16, false, 0, \
453 complain_overflow_signed, bfd_elf_generic_reloc, \
454 #name, false, 0, 0xffff, false)
455
456 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST, 0),
457 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST, 0),
458 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST, 16),
459 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST, 16),
460 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW2_LAST, 32),
461 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW2_LAST, 32),
462
463 /* PC-relative offsets. */
464
465 #define TILEGX_IMM16_HOWTO_PCREL(name, rshift) \
466 HOWTO (name, rshift, 1, 16, true, 0, \
467 complain_overflow_dont, bfd_elf_generic_reloc, \
468 #name, false, 0, 0xffff, true)
469
470 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW0_PCREL, 0),
471 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW0_PCREL, 0),
472 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW1_PCREL, 16),
473 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW1_PCREL, 16),
474 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW2_PCREL, 32),
475 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW2_PCREL, 32),
476 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW3_PCREL, 48),
477 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW3_PCREL, 48),
478
479 #define TILEGX_IMM16_HOWTO_LAST_PCREL(name, rshift) \
480 HOWTO (name, rshift, 1, 16, true, 0, \
481 complain_overflow_signed, bfd_elf_generic_reloc, \
482 #name, false, 0, 0xffff, true)
483
484 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW0_LAST_PCREL, 0),
485 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW0_LAST_PCREL, 0),
486 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW1_LAST_PCREL, 16),
487 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW1_LAST_PCREL, 16),
488 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW2_LAST_PCREL, 32),
489 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW2_LAST_PCREL, 32),
490
491 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0_GOT, 0),
492 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0_GOT, 0),
493
494 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW0_PLT_PCREL, 0),
495 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW0_PLT_PCREL, 0),
496 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW1_PLT_PCREL, 16),
497 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW1_PLT_PCREL, 16),
498 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW2_PLT_PCREL, 32),
499 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW2_PLT_PCREL, 32),
500
501 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST_GOT, 0),
502 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST_GOT, 0),
503 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST_GOT, 16),
504 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST_GOT, 16),
505
506 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X0_HW3_PLT_PCREL, 48),
507 TILEGX_IMM16_HOWTO_PCREL (R_TILEGX_IMM16_X1_HW3_PLT_PCREL, 48),
508
509 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0_TLS_GD, 0),
510 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0_TLS_GD, 0),
511
512 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X0_HW0_TLS_LE, 0),
513 TILEGX_IMM16_HOWTO (R_TILEGX_IMM16_X1_HW0_TLS_LE, 0),
514 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE, 0),
515 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE, 0),
516 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE, 16),
517 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE, 16),
518
519 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD, 0),
520 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD, 0),
521 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD, 16),
522 TILEGX_IMM16_HOWTO_LAST (R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD, 16),
523 EMPTY_HOWTO (90),
524 EMPTY_HOWTO (91),
525
526 #define TILEGX_IMM16_HOWTO_TLS_IE(name, rshift) \
527 HOWTO (name, rshift, 1, 16, false, 0, \
528 complain_overflow_dont, bfd_elf_generic_reloc, \
529 #name, false, 0, 0xffff, true)
530
531 TILEGX_IMM16_HOWTO_TLS_IE (R_TILEGX_IMM16_X0_HW0_TLS_IE, 0),
532 TILEGX_IMM16_HOWTO_TLS_IE (R_TILEGX_IMM16_X1_HW0_TLS_IE, 0),
533
534 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL, 0),
535 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL, 0),
536 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL, 16),
537 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL, 16),
538 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL, 32),
539 TILEGX_IMM16_HOWTO_LAST_PCREL (R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL, 32),
540
541 #define TILEGX_IMM16_HOWTO_LAST_TLS_IE(name, rshift) \
542 HOWTO (name, rshift, 1, 16, false, 0, \
543 complain_overflow_signed, bfd_elf_generic_reloc, \
544 #name, false, 0, 0xffff, true)
545
546 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE, 0),
547 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE, 0),
548 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE, 16),
549 TILEGX_IMM16_HOWTO_LAST_TLS_IE (R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE, 16),
550 EMPTY_HOWTO (104),
551 EMPTY_HOWTO (105),
552
553 HOWTO(R_TILEGX_TLS_DTPMOD64, 0, 0, 0, false, 0, complain_overflow_dont,
554 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPMOD64",
555 false, 0, 0, true),
556 HOWTO(R_TILEGX_TLS_DTPOFF64, 0, 4, 64, false, 0, complain_overflow_bitfield,
557 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPOFF64",
558 false, 0, -1, true),
559 HOWTO(R_TILEGX_TLS_TPOFF64, 0, 0, 0, false, 0, complain_overflow_dont,
560 bfd_elf_generic_reloc, "R_TILEGX_TLS_TPOFF64",
561 false, 0, 0, true),
562
563 HOWTO(R_TILEGX_TLS_DTPMOD32, 0, 0, 0, false, 0, complain_overflow_dont,
564 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPMOD32",
565 false, 0, 0, true),
566 HOWTO(R_TILEGX_TLS_DTPOFF32, 0, 4, 32, false, 0, complain_overflow_bitfield,
567 bfd_elf_generic_reloc, "R_TILEGX_TLS_DTPOFF32",
568 false, 0, -1, true),
569 HOWTO(R_TILEGX_TLS_TPOFF32, 0, 0, 0, false, 0, complain_overflow_dont,
570 bfd_elf_generic_reloc, "R_TILEGX_TLS_TPOFF32",
571 false, 0, 0, true),
572
573 HOWTO (R_TILEGX_TLS_GD_CALL, /* type */
574 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 27, /* bitsize */
577 true, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_signed,/* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_TILEGX_TLS_GD_CALL", /* name */
582 false, /* partial_inplace */
583 0, /* src_mask */
584 -1, /* dst_mask */
585 true), /* pcrel_offset */
586
587 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X0_TLS_GD_ADD, 0, 8),
588 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1_TLS_GD_ADD, 0, 8),
589 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0_TLS_GD_ADD, 0, 8),
590 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1_TLS_GD_ADD, 0, 8),
591 TILEGX_IMM_HOWTO(R_TILEGX_TLS_IE_LOAD, 0, 8),
592 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X0_TLS_ADD, 0, 8),
593 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_X1_TLS_ADD, 0, 8),
594 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y0_TLS_ADD, 0, 8),
595 TILEGX_IMM_HOWTO(R_TILEGX_IMM8_Y1_TLS_ADD, 0, 8),
596 };
597
598 static reloc_howto_type tilegx_elf_howto_table2 [] =
599 {
600 /* GNU extension to record C++ vtable hierarchy */
601 HOWTO (R_TILEGX_GNU_VTINHERIT, /* type */
602 0, /* rightshift */
603 4, /* size (0 = byte, 1 = short, 2 = long) */
604 0, /* bitsize */
605 false, /* pc_relative */
606 0, /* bitpos */
607 complain_overflow_dont, /* complain_on_overflow */
608 NULL, /* special_function */
609 "R_TILEGX_GNU_VTINHERIT", /* name */
610 false, /* partial_inplace */
611 0, /* src_mask */
612 0, /* dst_mask */
613 false), /* pcrel_offset */
614
615 /* GNU extension to record C++ vtable member usage */
616 HOWTO (R_TILEGX_GNU_VTENTRY, /* type */
617 0, /* rightshift */
618 4, /* size (0 = byte, 1 = short, 2 = long) */
619 0, /* bitsize */
620 false, /* pc_relative */
621 0, /* bitpos */
622 complain_overflow_dont, /* complain_on_overflow */
623 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
624 "R_TILEGX_GNU_VTENTRY", /* name */
625 false, /* partial_inplace */
626 0, /* src_mask */
627 0, /* dst_mask */
628 false), /* pcrel_offset */
629
630 };
631
632 /* Map BFD reloc types to TILEGX ELF reloc types. */
633
634 typedef struct tilegx_reloc_map
635 {
636 bfd_reloc_code_real_type bfd_reloc_val;
637 unsigned int tilegx_reloc_val;
638 reloc_howto_type * table;
639 } reloc_map;
640
641 static const reloc_map tilegx_reloc_map [] =
642 {
643 #define TH_REMAP(bfd, tilegx) \
644 { bfd, tilegx, tilegx_elf_howto_table },
645
646 /* Standard relocations. */
647 TH_REMAP (BFD_RELOC_NONE, R_TILEGX_NONE)
648 TH_REMAP (BFD_RELOC_64, R_TILEGX_64)
649 TH_REMAP (BFD_RELOC_32, R_TILEGX_32)
650 TH_REMAP (BFD_RELOC_16, R_TILEGX_16)
651 TH_REMAP (BFD_RELOC_8, R_TILEGX_8)
652 TH_REMAP (BFD_RELOC_64_PCREL, R_TILEGX_64_PCREL)
653 TH_REMAP (BFD_RELOC_32_PCREL, R_TILEGX_32_PCREL)
654 TH_REMAP (BFD_RELOC_16_PCREL, R_TILEGX_16_PCREL)
655 TH_REMAP (BFD_RELOC_8_PCREL, R_TILEGX_8_PCREL)
656
657 #define SIMPLE_REMAP(t) TH_REMAP (BFD_RELOC_##t, R_##t)
658
659 /* Custom relocations. */
660 SIMPLE_REMAP (TILEGX_HW0)
661 SIMPLE_REMAP (TILEGX_HW1)
662 SIMPLE_REMAP (TILEGX_HW2)
663 SIMPLE_REMAP (TILEGX_HW3)
664 SIMPLE_REMAP (TILEGX_HW0_LAST)
665 SIMPLE_REMAP (TILEGX_HW1_LAST)
666 SIMPLE_REMAP (TILEGX_HW2_LAST)
667 SIMPLE_REMAP (TILEGX_COPY)
668 SIMPLE_REMAP (TILEGX_GLOB_DAT)
669 SIMPLE_REMAP (TILEGX_JMP_SLOT)
670 SIMPLE_REMAP (TILEGX_RELATIVE)
671 SIMPLE_REMAP (TILEGX_BROFF_X1)
672 SIMPLE_REMAP (TILEGX_JUMPOFF_X1)
673 SIMPLE_REMAP (TILEGX_JUMPOFF_X1_PLT)
674 SIMPLE_REMAP (TILEGX_IMM8_X0)
675 SIMPLE_REMAP (TILEGX_IMM8_Y0)
676 SIMPLE_REMAP (TILEGX_IMM8_X1)
677 SIMPLE_REMAP (TILEGX_IMM8_Y1)
678 SIMPLE_REMAP (TILEGX_DEST_IMM8_X1)
679 SIMPLE_REMAP (TILEGX_MT_IMM14_X1)
680 SIMPLE_REMAP (TILEGX_MF_IMM14_X1)
681 SIMPLE_REMAP (TILEGX_MMSTART_X0)
682 SIMPLE_REMAP (TILEGX_MMEND_X0)
683 SIMPLE_REMAP (TILEGX_SHAMT_X0)
684 SIMPLE_REMAP (TILEGX_SHAMT_X1)
685 SIMPLE_REMAP (TILEGX_SHAMT_Y0)
686 SIMPLE_REMAP (TILEGX_SHAMT_Y1)
687 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0)
688 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0)
689 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1)
690 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1)
691 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2)
692 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2)
693 SIMPLE_REMAP (TILEGX_IMM16_X0_HW3)
694 SIMPLE_REMAP (TILEGX_IMM16_X1_HW3)
695 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST)
696 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST)
697 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST)
698 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST)
699 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST)
700 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST)
701 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_PCREL)
702 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_PCREL)
703 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_PCREL)
704 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_PCREL)
705 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_PCREL)
706 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_PCREL)
707 SIMPLE_REMAP (TILEGX_IMM16_X0_HW3_PCREL)
708 SIMPLE_REMAP (TILEGX_IMM16_X1_HW3_PCREL)
709 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_PCREL)
710 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_PCREL)
711 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_PCREL)
712 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_PCREL)
713 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST_PCREL)
714 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST_PCREL)
715 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_GOT)
716 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_GOT)
717 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_PLT_PCREL)
718 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_PLT_PCREL)
719 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_PLT_PCREL)
720 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_PLT_PCREL)
721 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_PLT_PCREL)
722 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_PLT_PCREL)
723 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_GOT)
724 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_GOT)
725 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_GOT)
726 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_GOT)
727 SIMPLE_REMAP (TILEGX_IMM16_X0_HW3_PLT_PCREL)
728 SIMPLE_REMAP (TILEGX_IMM16_X1_HW3_PLT_PCREL)
729 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_GD)
730 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_GD)
731 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_LE)
732 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_LE)
733 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_LE)
734 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_LE)
735 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_LE)
736 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_LE)
737 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_GD)
738 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_GD)
739 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_GD)
740 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_GD)
741 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_TLS_IE)
742 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_TLS_IE)
743 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL)
744 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL)
745 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL)
746 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL)
747 SIMPLE_REMAP (TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL)
748 SIMPLE_REMAP (TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL)
749 SIMPLE_REMAP (TILEGX_IMM16_X0_HW0_LAST_TLS_IE)
750 SIMPLE_REMAP (TILEGX_IMM16_X1_HW0_LAST_TLS_IE)
751 SIMPLE_REMAP (TILEGX_IMM16_X0_HW1_LAST_TLS_IE)
752 SIMPLE_REMAP (TILEGX_IMM16_X1_HW1_LAST_TLS_IE)
753
754 SIMPLE_REMAP (TILEGX_TLS_DTPMOD64)
755 SIMPLE_REMAP (TILEGX_TLS_DTPOFF64)
756 SIMPLE_REMAP (TILEGX_TLS_TPOFF64)
757
758 SIMPLE_REMAP (TILEGX_TLS_DTPMOD32)
759 SIMPLE_REMAP (TILEGX_TLS_DTPOFF32)
760 SIMPLE_REMAP (TILEGX_TLS_TPOFF32)
761
762 SIMPLE_REMAP (TILEGX_TLS_GD_CALL)
763 SIMPLE_REMAP (TILEGX_IMM8_X0_TLS_GD_ADD)
764 SIMPLE_REMAP (TILEGX_IMM8_X1_TLS_GD_ADD)
765 SIMPLE_REMAP (TILEGX_IMM8_Y0_TLS_GD_ADD)
766 SIMPLE_REMAP (TILEGX_IMM8_Y1_TLS_GD_ADD)
767 SIMPLE_REMAP (TILEGX_TLS_IE_LOAD)
768 SIMPLE_REMAP (TILEGX_IMM8_X0_TLS_ADD)
769 SIMPLE_REMAP (TILEGX_IMM8_X1_TLS_ADD)
770 SIMPLE_REMAP (TILEGX_IMM8_Y0_TLS_ADD)
771 SIMPLE_REMAP (TILEGX_IMM8_Y1_TLS_ADD)
772
773 #undef SIMPLE_REMAP
774 #undef TH_REMAP
775
776 { BFD_RELOC_VTABLE_INHERIT, R_TILEGX_GNU_VTINHERIT, tilegx_elf_howto_table2 },
777 { BFD_RELOC_VTABLE_ENTRY, R_TILEGX_GNU_VTENTRY, tilegx_elf_howto_table2 },
778 };
779
780
781
782 /* TILEGX ELF linker hash entry. */
783
784 struct tilegx_elf_link_hash_entry
785 {
786 struct elf_link_hash_entry elf;
787
788 #define GOT_UNKNOWN 0
789 #define GOT_NORMAL 1
790 #define GOT_TLS_GD 2
791 #define GOT_TLS_IE 4
792 unsigned char tls_type;
793 };
794
795 #define tilegx_elf_hash_entry(ent) \
796 ((struct tilegx_elf_link_hash_entry *)(ent))
797
798 struct _bfd_tilegx_elf_obj_tdata
799 {
800 struct elf_obj_tdata root;
801
802 /* tls_type for each local got entry. */
803 char *local_got_tls_type;
804 };
805
806 #define _bfd_tilegx_elf_tdata(abfd) \
807 ((struct _bfd_tilegx_elf_obj_tdata *) (abfd)->tdata.any)
808
809 #define _bfd_tilegx_elf_local_got_tls_type(abfd) \
810 (_bfd_tilegx_elf_tdata (abfd)->local_got_tls_type)
811
812 #define is_tilegx_elf(bfd) \
813 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
814 && elf_tdata (bfd) != NULL \
815 && elf_object_id (bfd) == TILEGX_ELF_DATA)
816
817 #include "elf/common.h"
818 #include "elf/internal.h"
819
820 struct tilegx_elf_link_hash_table
821 {
822 struct elf_link_hash_table elf;
823
824 int bytes_per_word;
825 int word_align_power;
826 int bytes_per_rela;
827 int dtpmod_reloc;
828 int dtpoff_reloc;
829 int tpoff_reloc;
830 bfd_vma (*r_info) (Elf_Internal_Rela *, bfd_vma, bfd_vma);
831 bfd_vma (*r_symndx) (bfd_vma);
832 void (*put_word) (bfd *, bfd_vma, void *);
833 const char *dynamic_interpreter;
834
835 /* Whether LE transition has been disabled for some of the
836 sections. */
837 bool disable_le_transition;
838 };
839
840
841 /* Get the Tile ELF linker hash table from a link_info structure. */
842 #define tilegx_elf_hash_table(p) \
843 ((is_elf_hash_table ((p)->hash) \
844 && elf_hash_table_id (elf_hash_table (p)) == TILEGX_ELF_DATA) \
845 ? (struct tilegx_elf_link_hash_table *) (p)->hash : NULL)
846
847 #ifdef BFD64
848 static bfd_vma
tilegx_elf_r_info_64(Elf_Internal_Rela * in_rel ATTRIBUTE_UNUSED,bfd_vma rel_index,bfd_vma type)849 tilegx_elf_r_info_64 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED,
850 bfd_vma rel_index,
851 bfd_vma type)
852 {
853 return ELF64_R_INFO (rel_index, type);
854 }
855
856 static bfd_vma
tilegx_elf_r_symndx_64(bfd_vma r_info)857 tilegx_elf_r_symndx_64 (bfd_vma r_info)
858 {
859 return ELF64_R_SYM (r_info);
860 }
861
862 static void
tilegx_put_word_64(bfd * abfd,bfd_vma val,void * ptr)863 tilegx_put_word_64 (bfd *abfd, bfd_vma val, void *ptr)
864 {
865 bfd_put_64 (abfd, val, ptr);
866 }
867 #endif /* BFD64 */
868
869 static bfd_vma
tilegx_elf_r_info_32(Elf_Internal_Rela * in_rel ATTRIBUTE_UNUSED,bfd_vma rel_index,bfd_vma type)870 tilegx_elf_r_info_32 (Elf_Internal_Rela *in_rel ATTRIBUTE_UNUSED,
871 bfd_vma rel_index,
872 bfd_vma type)
873 {
874 return ELF32_R_INFO (rel_index, type);
875 }
876
877 static bfd_vma
tilegx_elf_r_symndx_32(bfd_vma r_info)878 tilegx_elf_r_symndx_32 (bfd_vma r_info)
879 {
880 return ELF32_R_SYM (r_info);
881 }
882
883 static void
tilegx_put_word_32(bfd * abfd,bfd_vma val,void * ptr)884 tilegx_put_word_32 (bfd *abfd, bfd_vma val, void *ptr)
885 {
886 bfd_put_32 (abfd, val, ptr);
887 }
888
889 reloc_howto_type *
tilegx_reloc_type_lookup(bfd * abfd,bfd_reloc_code_real_type code)890 tilegx_reloc_type_lookup (bfd * abfd,
891 bfd_reloc_code_real_type code)
892 {
893 unsigned int i;
894
895 for (i = ARRAY_SIZE (tilegx_reloc_map); i--;)
896 {
897 const reloc_map * entry;
898
899 entry = tilegx_reloc_map + i;
900
901 if (entry->bfd_reloc_val == code)
902 return entry->table + (entry->tilegx_reloc_val
903 - entry->table[0].type);
904 }
905
906 /* xgettext:c-format */
907 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
908 abfd, (int) code);
909 bfd_set_error (bfd_error_bad_value);
910 return NULL;
911 }
912
913 reloc_howto_type *
tilegx_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)914 tilegx_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
915 const char *r_name)
916 {
917 unsigned int i;
918
919 for (i = 0;
920 i < (sizeof (tilegx_elf_howto_table)
921 / sizeof (tilegx_elf_howto_table[0]));
922 i++)
923 if (tilegx_elf_howto_table[i].name != NULL
924 && strcasecmp (tilegx_elf_howto_table[i].name, r_name) == 0)
925 return &tilegx_elf_howto_table[i];
926
927 return NULL;
928 }
929
930 bool
tilegx_info_to_howto_rela(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)931 tilegx_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
932 arelent *cache_ptr,
933 Elf_Internal_Rela *dst)
934 {
935 unsigned int r_type = TILEGX_ELF_R_TYPE (dst->r_info);
936
937 if (r_type <= (unsigned int) R_TILEGX_IMM8_Y1_TLS_ADD)
938 cache_ptr->howto = &tilegx_elf_howto_table [r_type];
939 else if (r_type - R_TILEGX_GNU_VTINHERIT
940 <= ((unsigned int) R_TILEGX_GNU_VTENTRY
941 - (unsigned int) R_TILEGX_GNU_VTINHERIT))
942 cache_ptr->howto
943 = &tilegx_elf_howto_table2 [r_type - R_TILEGX_GNU_VTINHERIT];
944 else
945 {
946 /* xgettext:c-format */
947 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
948 abfd, r_type);
949 bfd_set_error (bfd_error_bad_value);
950 return false;
951 }
952 return true;
953 }
954
955 typedef tilegx_bundle_bits (*tilegx_create_func)(int);
956
957 static const tilegx_create_func reloc_to_create_func[] =
958 {
959 /* The first twenty relocation types don't correspond to operands */
960 NULL,
961 NULL,
962 NULL,
963 NULL,
964 NULL,
965 NULL,
966 NULL,
967 NULL,
968 NULL,
969 NULL,
970 NULL,
971 NULL,
972 NULL,
973 NULL,
974 NULL,
975 NULL,
976 NULL,
977 NULL,
978 NULL,
979 NULL,
980
981 /* The remaining relocations are used for immediate operands */
982 create_BrOff_X1,
983 create_JumpOff_X1,
984 create_JumpOff_X1,
985 create_Imm8_X0,
986 create_Imm8_Y0,
987 create_Imm8_X1,
988 create_Imm8_Y1,
989 create_Dest_Imm8_X1,
990 create_MT_Imm14_X1,
991 create_MF_Imm14_X1,
992 create_BFStart_X0,
993 create_BFEnd_X0,
994 create_ShAmt_X0,
995 create_ShAmt_X1,
996 create_ShAmt_Y0,
997 create_ShAmt_Y1,
998 create_Imm16_X0,
999 create_Imm16_X1,
1000 create_Imm16_X0,
1001 create_Imm16_X1,
1002 create_Imm16_X0,
1003 create_Imm16_X1,
1004 create_Imm16_X0,
1005 create_Imm16_X1,
1006 create_Imm16_X0,
1007 create_Imm16_X1,
1008 create_Imm16_X0,
1009 create_Imm16_X1,
1010 create_Imm16_X0,
1011 create_Imm16_X1,
1012 create_Imm16_X0,
1013 create_Imm16_X1,
1014 create_Imm16_X0,
1015 create_Imm16_X1,
1016 create_Imm16_X0,
1017 create_Imm16_X1,
1018 create_Imm16_X0,
1019 create_Imm16_X1,
1020 create_Imm16_X0,
1021 create_Imm16_X1,
1022 create_Imm16_X0,
1023 create_Imm16_X1,
1024 create_Imm16_X0,
1025 create_Imm16_X1,
1026 create_Imm16_X0,
1027 create_Imm16_X1,
1028 create_Imm16_X0,
1029 create_Imm16_X1,
1030 create_Imm16_X0,
1031 create_Imm16_X1,
1032 create_Imm16_X0,
1033 create_Imm16_X1,
1034 create_Imm16_X0,
1035 create_Imm16_X1,
1036 create_Imm16_X0,
1037 create_Imm16_X1,
1038 create_Imm16_X0,
1039 create_Imm16_X1,
1040 create_Imm16_X0,
1041 create_Imm16_X1,
1042 create_Imm16_X0,
1043 create_Imm16_X1,
1044 create_Imm16_X0,
1045 create_Imm16_X1,
1046 create_Imm16_X0,
1047 create_Imm16_X1,
1048 create_Imm16_X0,
1049 create_Imm16_X1,
1050 create_Imm16_X0,
1051 create_Imm16_X1,
1052 NULL,
1053 NULL,
1054 create_Imm16_X0,
1055 create_Imm16_X1,
1056 create_Imm16_X0,
1057 create_Imm16_X1,
1058 create_Imm16_X0,
1059 create_Imm16_X1,
1060 create_Imm16_X0,
1061 create_Imm16_X1,
1062 create_Imm16_X0,
1063 create_Imm16_X1,
1064 create_Imm16_X0,
1065 create_Imm16_X1,
1066 };
1067
1068 static void
tilegx_elf_append_rela(bfd * abfd,asection * s,Elf_Internal_Rela * rel)1069 tilegx_elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel)
1070 {
1071 const struct elf_backend_data *bed;
1072 bfd_byte *loc;
1073
1074 bed = get_elf_backend_data (abfd);
1075 loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela);
1076 bed->s->swap_reloca_out (abfd, rel, loc);
1077 }
1078
1079 /* PLT/GOT stuff */
1080
1081 /* The procedure linkage table starts with the following header:
1082
1083 ld_add r28, r27, 8
1084 ld r27, r27
1085 {
1086 jr r27
1087 info 10 ## SP not offset, return PC in LR
1088 }
1089
1090 Subsequent entries are the following, jumping to the header at the end:
1091
1092 {
1093 moveli r28, <_GLOBAL_OFFSET_TABLE_ - 1f + MY_GOT_OFFSET>
1094 lnk r26
1095 }
1096 1:
1097 {
1098 moveli r27, <_GLOBAL_OFFSET_TABLE_ - 1b>
1099 shl16insli r28, r28, <_GLOBAL_OFFSET_TABLE_ - 1b + MY_GOT_OFFSET>
1100 }
1101 {
1102 add r28, r26, r28
1103 shl16insli r27, r27, <_GLOBAL_OFFSET_TABLE_ - 1b>
1104 }
1105 {
1106 add r27, r26, r27
1107 ld r28, r28
1108 info 10 ## SP not offset, return PC in LR
1109 }
1110 {
1111 shl16insli r29, zero, MY_PLT_INDEX
1112 jr r28
1113 }
1114
1115 This code sequence lets the code at at the start of the PLT determine
1116 which PLT entry was executed by examining 'r29'.
1117
1118 Note that MY_PLT_INDEX skips over the header entries, so the first
1119 actual jump table entry has index zero.
1120
1121 If the offset fits in 16 bits,
1122
1123 lnk r26
1124 1:
1125 {
1126 addli r28, r26, <_GLOBAL_OFFSET_TABLE_ - 1b + MY_GOT_OFFSET>
1127 moveli r27, <_GLOBAL_OFFSET_TABLE_ - 1b>
1128 }
1129 {
1130 shl16insli r29, zero, MY_PLT_INDEX
1131 ld r28, r28
1132 }
1133 {
1134 add r27, r26, r27
1135 jr r28
1136 }
1137 info 10 ## SP not offset, return PC in LR
1138
1139 For the purpose of backtracing, the procedure linkage table ends with the
1140 following tail entry:
1141
1142 info 10 ## SP not offset, return PC in LR
1143
1144 The 32-bit versions are similar, with ld4s replacing ld, and offsets into
1145 the GOT being multiples of 4 instead of 8.
1146
1147 */
1148
1149 #define PLT_HEADER_SIZE_IN_BUNDLES 3
1150 #define PLT_ENTRY_SIZE_IN_BUNDLES 5
1151 #define PLT_TAIL_SIZE_IN_BUNDLES 1
1152
1153 #define PLT_HEADER_SIZE \
1154 (PLT_HEADER_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES)
1155 #define PLT_ENTRY_SIZE \
1156 (PLT_ENTRY_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES)
1157 #define PLT_TAIL_SIZE \
1158 (PLT_TAIL_SIZE_IN_BUNDLES * TILEGX_BUNDLE_SIZE_IN_BYTES)
1159
1160 #define GOT_ENTRY_SIZE(htab) TILEGX_ELF_WORD_BYTES (htab)
1161
1162 #define GOTPLT_HEADER_SIZE(htab) (2 * GOT_ENTRY_SIZE (htab))
1163
1164 static const bfd_byte
1165 tilegx64_plt0_entry[PLT_HEADER_SIZE] =
1166 {
1167 0x00, 0x30, 0x48, 0x51,
1168 0x6e, 0x43, 0xa0, 0x18, /* { ld_add r28, r27, 8 } */
1169 0x00, 0x30, 0xbc, 0x35,
1170 0x00, 0x40, 0xde, 0x9e, /* { ld r27, r27 } */
1171 0xff, 0xaf, 0x30, 0x40,
1172 0x60, 0x73, 0x6a, 0x28, /* { info 10 ; jr r27 } */
1173 };
1174
1175 static const bfd_byte
1176 tilegx64_long_plt_entry[PLT_ENTRY_SIZE] =
1177 {
1178 0xdc, 0x0f, 0x00, 0x10,
1179 0x0d, 0xf0, 0x6a, 0x28, /* { moveli r28, 0 ; lnk r26 } */
1180 0xdb, 0x0f, 0x00, 0x10,
1181 0x8e, 0x03, 0x00, 0x38, /* { moveli r27, 0 ; shl16insli r28, r28, 0 } */
1182 0x9c, 0xc6, 0x0d, 0xd0,
1183 0x6d, 0x03, 0x00, 0x38, /* { add r28, r26, r28 ; shl16insli r27, r27, 0 } */
1184 0x9b, 0xb6, 0xc5, 0xad,
1185 0xff, 0x57, 0xe0, 0x8e, /* { add r27, r26, r27 ; info 10 ; ld r28, r28 } */
1186 0xdd, 0x0f, 0x00, 0x70,
1187 0x80, 0x73, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; jr r28 } */
1188 };
1189
1190 static const bfd_byte
1191 tilegx64_short_plt_entry[PLT_ENTRY_SIZE] =
1192 {
1193 0x00, 0x30, 0x48, 0x51,
1194 0x0d, 0xf0, 0x6a, 0x28, /* { lnk r26 } */
1195 0x9c, 0x06, 0x00, 0x90,
1196 0xed, 0x07, 0x00, 0x00, /* { addli r28, r26, 0 ; moveli r27, 0 } */
1197 0xdd, 0x0f, 0x00, 0x70,
1198 0x8e, 0xeb, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; ld r28, r28 } */
1199 0x9b, 0xb6, 0x0d, 0x50,
1200 0x80, 0x73, 0x6a, 0x28, /* { add r27, r26, r27 ; jr r28 } */
1201 0x00, 0x30, 0x48, 0xd1,
1202 0xff, 0x57, 0x18, 0x18, /* { info 10 } */
1203 };
1204
1205 /* Reuse an existing info 10 bundle. */
1206 static const bfd_byte *const tilegx64_plt_tail_entry =
1207 &tilegx64_short_plt_entry[4 * TILEGX_BUNDLE_SIZE_IN_BYTES];
1208
1209 static const bfd_byte
1210 tilegx32_plt0_entry[PLT_HEADER_SIZE] =
1211 {
1212 0x00, 0x30, 0x48, 0x51,
1213 0x6e, 0x23, 0x58, 0x18, /* { ld4s_add r28, r27, 4 } */
1214 0x00, 0x30, 0xbc, 0x35,
1215 0x00, 0x40, 0xde, 0x9c, /* { ld4s r27, r27 } */
1216 0xff, 0xaf, 0x30, 0x40,
1217 0x60, 0x73, 0x6a, 0x28, /* { info 10 ; jr r27 } */
1218 };
1219
1220 static const bfd_byte
1221 tilegx32_long_plt_entry[PLT_ENTRY_SIZE] =
1222 {
1223 0xdc, 0x0f, 0x00, 0x10,
1224 0x0d, 0xf0, 0x6a, 0x28, /* { moveli r28, 0 ; lnk r26 } */
1225 0xdb, 0x0f, 0x00, 0x10,
1226 0x8e, 0x03, 0x00, 0x38, /* { moveli r27, 0 ; shl16insli r28, r28, 0 } */
1227 0x9c, 0xc6, 0x0d, 0xd0,
1228 0x6d, 0x03, 0x00, 0x38, /* { add r28, r26, r28 ; shl16insli r27, r27, 0 } */
1229 0x9b, 0xb6, 0xc5, 0xad,
1230 0xff, 0x57, 0xe0, 0x8c, /* { add r27, r26, r27 ; info 10 ; ld4s r28, r28 } */
1231 0xdd, 0x0f, 0x00, 0x70,
1232 0x80, 0x73, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; jr r28 } */
1233 };
1234
1235 static const bfd_byte
1236 tilegx32_short_plt_entry[PLT_ENTRY_SIZE] =
1237 {
1238 0x00, 0x30, 0x48, 0x51,
1239 0x0d, 0xf0, 0x6a, 0x28, /* { lnk r26 } */
1240 0x9c, 0x06, 0x00, 0x90,
1241 0xed, 0x07, 0x00, 0x00, /* { addli r28, r26, 0 ; moveli r27, 0 } */
1242 0xdd, 0x0f, 0x00, 0x70,
1243 0x8e, 0x9b, 0x6a, 0x28, /* { shl16insli r29, zero, 0 ; ld4s r28, r28 } */
1244 0x9b, 0xb6, 0x0d, 0x50,
1245 0x80, 0x73, 0x6a, 0x28, /* { add r27, r26, r27 ; jr r28 } */
1246 0x00, 0x30, 0x48, 0xd1,
1247 0xff, 0x57, 0x18, 0x18, /* { info 10 } */
1248 };
1249
1250 /* Reuse an existing info 10 bundle. */
1251 static const bfd_byte *const tilegx32_plt_tail_entry =
1252 &tilegx64_short_plt_entry[4 * TILEGX_BUNDLE_SIZE_IN_BYTES];
1253
1254 static int
tilegx_plt_entry_build(bfd * output_bfd,struct tilegx_elf_link_hash_table * htab,asection * splt,asection * sgotplt,bfd_vma offset,bfd_vma * r_offset)1255 tilegx_plt_entry_build (bfd *output_bfd,
1256 struct tilegx_elf_link_hash_table *htab,
1257 asection *splt, asection *sgotplt,
1258 bfd_vma offset, bfd_vma *r_offset)
1259 {
1260 int plt_index = (offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
1261 int got_offset = (plt_index * GOT_ENTRY_SIZE (htab)
1262 + GOTPLT_HEADER_SIZE (htab));
1263 tilegx_bundle_bits *pc;
1264
1265 /* Compute the distance from the got entry to the lnk. */
1266 bfd_signed_vma dist_got_entry = sgotplt->output_section->vma
1267 + sgotplt->output_offset
1268 + got_offset
1269 - splt->output_section->vma
1270 - splt->output_offset
1271 - offset
1272 - TILEGX_BUNDLE_SIZE_IN_BYTES;
1273
1274 /* Compute the distance to GOTPLT[0]. */
1275 bfd_signed_vma dist_got0 = dist_got_entry - got_offset;
1276
1277 /* Check whether we can use the short plt entry with 16-bit offset. */
1278 bool short_plt_entry =
1279 (dist_got_entry <= 0x7fff && dist_got0 >= -0x8000);
1280
1281 const tilegx_bundle_bits *plt_entry = (tilegx_bundle_bits *)
1282 (ABI_64_P (output_bfd) ?
1283 (short_plt_entry ? tilegx64_short_plt_entry : tilegx64_long_plt_entry) :
1284 (short_plt_entry ? tilegx32_short_plt_entry : tilegx32_long_plt_entry));
1285
1286 /* Copy the plt entry template. */
1287 memcpy (splt->contents + offset, plt_entry, PLT_ENTRY_SIZE);
1288
1289 /* Write the immediate offsets. */
1290 pc = (tilegx_bundle_bits *)(splt->contents + offset);
1291
1292 if (short_plt_entry)
1293 {
1294 /* { lnk r28 } */
1295 pc++;
1296
1297 /* { addli r28, r28, &GOTPLT[MY_GOT_INDEX] ; moveli r27, &GOTPLT[0] } */
1298 *pc++ |= create_Imm16_X0 (dist_got_entry)
1299 | create_Imm16_X1 (dist_got0);
1300
1301 /* { shl16insli r29, zero, MY_PLT_INDEX ; ld r28, r28 } */
1302 *pc++ |= create_Imm16_X0 (plt_index);
1303 }
1304 else
1305 {
1306 /* { moveli r28, &GOTPLT[MY_GOT_INDEX] ; lnk r26 } */
1307 *pc++ |= create_Imm16_X0 (dist_got_entry >> 16);
1308
1309 /* { moveli r27, &GOTPLT[0] ;
1310 shl16insli r28, r28, &GOTPLT[MY_GOT_INDEX] } */
1311 *pc++ |= create_Imm16_X0 (dist_got0 >> 16)
1312 | create_Imm16_X1 (dist_got_entry);
1313
1314 /* { add r28, r26, r28 ; shl16insli r27, r27, &GOTPLT[0] } */
1315 *pc++ |= create_Imm16_X1 (dist_got0);
1316
1317 /* { add r27, r26, r27 ; info 10 ; ld r28, r28 } */
1318 pc++;
1319
1320 /* { shl16insli r29, zero, MY_GOT_INDEX ; jr r28 } */
1321 *pc++ |= create_Imm16_X0 (plt_index);
1322 }
1323
1324 /* Set the relocation offset. */
1325 *r_offset = got_offset;
1326
1327 return plt_index;
1328 }
1329
1330 /* Create an entry in an TILEGX ELF linker hash table. */
1331
1332 static struct bfd_hash_entry *
link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)1333 link_hash_newfunc (struct bfd_hash_entry *entry,
1334 struct bfd_hash_table *table, const char *string)
1335 {
1336 /* Allocate the structure if it has not already been allocated by a
1337 subclass. */
1338 if (entry == NULL)
1339 {
1340 entry =
1341 bfd_hash_allocate (table,
1342 sizeof (struct tilegx_elf_link_hash_entry));
1343 if (entry == NULL)
1344 return entry;
1345 }
1346
1347 /* Call the allocation method of the superclass. */
1348 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1349 if (entry != NULL)
1350 {
1351 struct tilegx_elf_link_hash_entry *eh;
1352
1353 eh = (struct tilegx_elf_link_hash_entry *) entry;
1354 eh->tls_type = GOT_UNKNOWN;
1355 }
1356
1357 return entry;
1358 }
1359
1360 /* Create a TILEGX ELF linker hash table. */
1361
1362 struct bfd_link_hash_table *
tilegx_elf_link_hash_table_create(bfd * abfd)1363 tilegx_elf_link_hash_table_create (bfd *abfd)
1364 {
1365 struct tilegx_elf_link_hash_table *ret;
1366 size_t amt = sizeof (struct tilegx_elf_link_hash_table);
1367
1368 ret = (struct tilegx_elf_link_hash_table *) bfd_zmalloc (amt);
1369 if (ret == NULL)
1370 return NULL;
1371
1372 #ifdef BFD64
1373 if (ABI_64_P (abfd))
1374 {
1375 ret->bytes_per_word = 8;
1376 ret->word_align_power = 3;
1377 ret->bytes_per_rela = sizeof (Elf64_External_Rela);
1378 ret->dtpoff_reloc = R_TILEGX_TLS_DTPOFF64;
1379 ret->dtpmod_reloc = R_TILEGX_TLS_DTPMOD64;
1380 ret->tpoff_reloc = R_TILEGX_TLS_TPOFF64;
1381 ret->r_info = tilegx_elf_r_info_64;
1382 ret->r_symndx = tilegx_elf_r_symndx_64;
1383 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
1384 ret->put_word = tilegx_put_word_64;
1385 }
1386 else
1387 #endif
1388 {
1389 ret->bytes_per_word = 4;
1390 ret->word_align_power = 2;
1391 ret->bytes_per_rela = sizeof (Elf32_External_Rela);
1392 ret->dtpoff_reloc = R_TILEGX_TLS_DTPOFF32;
1393 ret->dtpmod_reloc = R_TILEGX_TLS_DTPMOD32;
1394 ret->tpoff_reloc = R_TILEGX_TLS_TPOFF32;
1395 ret->r_info = tilegx_elf_r_info_32;
1396 ret->r_symndx = tilegx_elf_r_symndx_32;
1397 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1398 ret->put_word = tilegx_put_word_32;
1399 }
1400
1401 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
1402 sizeof (struct tilegx_elf_link_hash_entry),
1403 TILEGX_ELF_DATA))
1404 {
1405 free (ret);
1406 return NULL;
1407 }
1408
1409 return &ret->elf.root;
1410 }
1411
1412 /* Create the .got section. */
1413
1414 static bool
tilegx_elf_create_got_section(bfd * abfd,struct bfd_link_info * info)1415 tilegx_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
1416 {
1417 flagword flags;
1418 asection *s, *s_got;
1419 struct elf_link_hash_entry *h;
1420 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1421 struct elf_link_hash_table *htab = elf_hash_table (info);
1422
1423 /* This function may be called more than once. */
1424 if (htab->sgot != NULL)
1425 return true;
1426
1427 flags = bed->dynamic_sec_flags;
1428
1429 s = bfd_make_section_anyway_with_flags (abfd,
1430 (bed->rela_plts_and_copies_p
1431 ? ".rela.got" : ".rel.got"),
1432 (bed->dynamic_sec_flags
1433 | SEC_READONLY));
1434 if (s == NULL
1435 || !bfd_set_section_alignment (s, bed->s->log_file_align))
1436 return false;
1437 htab->srelgot = s;
1438
1439 s = s_got = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
1440 if (s == NULL
1441 || !bfd_set_section_alignment (s, bed->s->log_file_align))
1442 return false;
1443 htab->sgot = s;
1444
1445 /* The first bit of the global offset table is the header. */
1446 s->size += bed->got_header_size;
1447
1448 if (bed->want_got_plt)
1449 {
1450 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
1451 if (s == NULL
1452 || !bfd_set_section_alignment (s, bed->s->log_file_align))
1453 return false;
1454 htab->sgotplt = s;
1455
1456 /* Reserve room for the header. */
1457 s->size += GOTPLT_HEADER_SIZE (tilegx_elf_hash_table (info));
1458 }
1459
1460 if (bed->want_got_sym)
1461 {
1462 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
1463 section. We don't do this in the linker script because we don't want
1464 to define the symbol if we are not creating a global offset
1465 table. */
1466 h = _bfd_elf_define_linkage_sym (abfd, info, s_got,
1467 "_GLOBAL_OFFSET_TABLE_");
1468 elf_hash_table (info)->hgot = h;
1469 if (h == NULL)
1470 return false;
1471 }
1472
1473 return true;
1474 }
1475
1476 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1477 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1478 hash table. */
1479
1480 bool
tilegx_elf_create_dynamic_sections(bfd * dynobj,struct bfd_link_info * info)1481 tilegx_elf_create_dynamic_sections (bfd *dynobj,
1482 struct bfd_link_info *info)
1483 {
1484 if (!tilegx_elf_create_got_section (dynobj, info))
1485 return false;
1486
1487 return _bfd_elf_create_dynamic_sections (dynobj, info);
1488 }
1489
1490 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1491
1492 void
tilegx_elf_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)1493 tilegx_elf_copy_indirect_symbol (struct bfd_link_info *info,
1494 struct elf_link_hash_entry *dir,
1495 struct elf_link_hash_entry *ind)
1496 {
1497 struct tilegx_elf_link_hash_entry *edir, *eind;
1498
1499 edir = (struct tilegx_elf_link_hash_entry *) dir;
1500 eind = (struct tilegx_elf_link_hash_entry *) ind;
1501
1502 if (ind->root.type == bfd_link_hash_indirect
1503 && dir->got.refcount <= 0)
1504 {
1505 edir->tls_type = eind->tls_type;
1506 eind->tls_type = GOT_UNKNOWN;
1507 }
1508 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1509 }
1510
1511 static int
tilegx_tls_translate_to_le(int r_type)1512 tilegx_tls_translate_to_le (int r_type)
1513 {
1514 switch (r_type)
1515 {
1516 case R_TILEGX_IMM16_X0_HW0_TLS_GD:
1517 case R_TILEGX_IMM16_X0_HW0_TLS_IE:
1518 return R_TILEGX_IMM16_X0_HW0_TLS_LE;
1519
1520 case R_TILEGX_IMM16_X1_HW0_TLS_GD:
1521 case R_TILEGX_IMM16_X1_HW0_TLS_IE:
1522 return R_TILEGX_IMM16_X1_HW0_TLS_LE;
1523
1524 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
1525 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
1526 return R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE;
1527
1528 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
1529 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
1530 return R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE;
1531
1532 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
1533 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
1534 return R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE;
1535
1536 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
1537 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
1538 return R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE;
1539 }
1540 return r_type;
1541 }
1542
1543 static int
tilegx_tls_translate_to_ie(int r_type)1544 tilegx_tls_translate_to_ie (int r_type)
1545 {
1546 switch (r_type)
1547 {
1548 case R_TILEGX_IMM16_X0_HW0_TLS_GD:
1549 case R_TILEGX_IMM16_X0_HW0_TLS_IE:
1550 return R_TILEGX_IMM16_X0_HW0_TLS_IE;
1551
1552 case R_TILEGX_IMM16_X1_HW0_TLS_GD:
1553 case R_TILEGX_IMM16_X1_HW0_TLS_IE:
1554 return R_TILEGX_IMM16_X1_HW0_TLS_IE;
1555
1556 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
1557 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
1558 return R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE;
1559
1560 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
1561 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
1562 return R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE;
1563
1564 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
1565 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
1566 return R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE;
1567
1568 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
1569 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
1570 return R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE;
1571 }
1572 return r_type;
1573 }
1574
1575 static int
tilegx_elf_tls_transition(struct bfd_link_info * info,int r_type,int is_local,bool disable_le_transition)1576 tilegx_elf_tls_transition (struct bfd_link_info *info, int r_type,
1577 int is_local, bool disable_le_transition)
1578 {
1579 if (!bfd_link_executable (info))
1580 return r_type;
1581
1582 if (is_local && !disable_le_transition)
1583 return tilegx_tls_translate_to_le (r_type);
1584 else
1585 return tilegx_tls_translate_to_ie (r_type);
1586 }
1587
1588 /* Look through the relocs for a section during the first phase, and
1589 allocate space in the global offset table or procedure linkage
1590 table. */
1591
1592 bool
tilegx_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)1593 tilegx_elf_check_relocs (bfd *abfd, struct bfd_link_info *info,
1594 asection *sec, const Elf_Internal_Rela *relocs)
1595 {
1596 struct tilegx_elf_link_hash_table *htab;
1597 Elf_Internal_Shdr *symtab_hdr;
1598 struct elf_link_hash_entry **sym_hashes;
1599 const Elf_Internal_Rela *rel;
1600 const Elf_Internal_Rela *rel_end;
1601 asection *sreloc;
1602 int num_relocs;
1603 bool has_tls_gd_or_ie = false, has_tls_add = false;
1604
1605 if (bfd_link_relocatable (info))
1606 return true;
1607
1608 htab = tilegx_elf_hash_table (info);
1609 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1610 sym_hashes = elf_sym_hashes (abfd);
1611
1612 sreloc = NULL;
1613
1614 num_relocs = sec->reloc_count;
1615
1616 BFD_ASSERT (is_tilegx_elf (abfd) || num_relocs == 0);
1617
1618 if (htab->elf.dynobj == NULL)
1619 htab->elf.dynobj = abfd;
1620
1621 rel_end = relocs + num_relocs;
1622
1623 /* Check whether to do optimization to transform TLS GD/IE
1624 referehces to TLS LE. We disable it if we're linking with old
1625 TLS code sequences that do not support such optimization. Old
1626 TLS code sequences have tls_gd_call/tls_ie_load relocations but
1627 no tls_add relocations. */
1628 for (rel = relocs; rel < rel_end && !has_tls_add; rel++)
1629 {
1630 int r_type = TILEGX_ELF_R_TYPE (rel->r_info);
1631 switch (r_type)
1632 {
1633 case R_TILEGX_TLS_GD_CALL:
1634 case R_TILEGX_TLS_IE_LOAD:
1635 has_tls_gd_or_ie = true;
1636 break;
1637 case R_TILEGX_IMM8_X0_TLS_ADD:
1638 case R_TILEGX_IMM8_Y0_TLS_ADD:
1639 case R_TILEGX_IMM8_X1_TLS_ADD:
1640 case R_TILEGX_IMM8_Y1_TLS_ADD:
1641 has_tls_add = true;
1642 break;
1643 }
1644 }
1645
1646 sec->sec_flg0 = (has_tls_gd_or_ie && !has_tls_add);
1647 htab->disable_le_transition |= sec->sec_flg0;
1648
1649 for (rel = relocs; rel < rel_end; rel++)
1650 {
1651 unsigned int r_type;
1652 unsigned int r_symndx;
1653 struct elf_link_hash_entry *h;
1654 int tls_type;
1655
1656 r_symndx = TILEGX_ELF_R_SYMNDX (htab, rel->r_info);
1657 r_type = TILEGX_ELF_R_TYPE (rel->r_info);
1658
1659 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1660 {
1661 /* xgettext:c-format */
1662 _bfd_error_handler (_("%pB: bad symbol index: %d"),
1663 abfd, r_symndx);
1664 return false;
1665 }
1666
1667 if (r_symndx < symtab_hdr->sh_info)
1668 h = NULL;
1669 else
1670 {
1671 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1672 while (h->root.type == bfd_link_hash_indirect
1673 || h->root.type == bfd_link_hash_warning)
1674 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1675 }
1676
1677 r_type = tilegx_elf_tls_transition (info, r_type, h == NULL,
1678 sec->sec_flg0);
1679 switch (r_type)
1680 {
1681 case R_TILEGX_IMM16_X0_HW0_TLS_LE:
1682 case R_TILEGX_IMM16_X1_HW0_TLS_LE:
1683 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE:
1684 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE:
1685 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE:
1686 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE:
1687 if (!bfd_link_executable (info))
1688 goto r_tilegx_plt32;
1689 break;
1690
1691 case R_TILEGX_IMM16_X0_HW0_TLS_GD:
1692 case R_TILEGX_IMM16_X1_HW0_TLS_GD:
1693 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
1694 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
1695 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
1696 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
1697 BFD_ASSERT (bfd_link_pic (info));
1698 tls_type = GOT_TLS_GD;
1699 goto have_got_reference;
1700
1701 case R_TILEGX_IMM16_X0_HW0_TLS_IE:
1702 case R_TILEGX_IMM16_X1_HW0_TLS_IE:
1703 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
1704 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
1705 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
1706 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
1707 tls_type = GOT_TLS_IE;
1708 if (!bfd_link_executable (info))
1709 info->flags |= DF_STATIC_TLS;
1710 goto have_got_reference;
1711
1712 case R_TILEGX_IMM16_X0_HW0_GOT:
1713 case R_TILEGX_IMM16_X1_HW0_GOT:
1714 case R_TILEGX_IMM16_X0_HW0_LAST_GOT:
1715 case R_TILEGX_IMM16_X1_HW0_LAST_GOT:
1716 case R_TILEGX_IMM16_X0_HW1_LAST_GOT:
1717 case R_TILEGX_IMM16_X1_HW1_LAST_GOT:
1718 tls_type = GOT_NORMAL;
1719 /* Fall Through */
1720
1721 have_got_reference:
1722 /* This symbol requires a global offset table entry. */
1723 {
1724 int old_tls_type;
1725
1726 if (h != NULL)
1727 {
1728 h->got.refcount += 1;
1729 old_tls_type = tilegx_elf_hash_entry(h)->tls_type;
1730 }
1731 else
1732 {
1733 bfd_signed_vma *local_got_refcounts;
1734
1735 /* This is a global offset table entry for a local symbol. */
1736 local_got_refcounts = elf_local_got_refcounts (abfd);
1737 if (local_got_refcounts == NULL)
1738 {
1739 bfd_size_type size;
1740
1741 size = symtab_hdr->sh_info;
1742 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1743 local_got_refcounts = ((bfd_signed_vma *)
1744 bfd_zalloc (abfd, size));
1745 if (local_got_refcounts == NULL)
1746 return false;
1747 elf_local_got_refcounts (abfd) = local_got_refcounts;
1748 _bfd_tilegx_elf_local_got_tls_type (abfd)
1749 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1750 }
1751 local_got_refcounts[r_symndx] += 1;
1752 old_tls_type = _bfd_tilegx_elf_local_got_tls_type (abfd) [r_symndx];
1753 }
1754
1755 /* If a TLS symbol is accessed using IE at least once,
1756 there is no point to use dynamic model for it. */
1757 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1758 && (old_tls_type != GOT_TLS_GD
1759 || tls_type != GOT_TLS_IE))
1760 {
1761 if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD)
1762 tls_type = old_tls_type;
1763 else
1764 {
1765 _bfd_error_handler
1766 /* xgettext:c-format */
1767 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1768 abfd, h ? h->root.root.string : "<local>");
1769 return false;
1770 }
1771 }
1772
1773 if (old_tls_type != tls_type)
1774 {
1775 if (h != NULL)
1776 tilegx_elf_hash_entry (h)->tls_type = tls_type;
1777 else
1778 _bfd_tilegx_elf_local_got_tls_type (abfd) [r_symndx] = tls_type;
1779 }
1780 }
1781
1782 if (htab->elf.sgot == NULL)
1783 {
1784 if (!tilegx_elf_create_got_section (htab->elf.dynobj, info))
1785 return false;
1786 }
1787 break;
1788
1789 case R_TILEGX_TLS_GD_CALL:
1790 if (!bfd_link_executable (info))
1791 {
1792 /* These are basically R_TILEGX_JUMPOFF_X1_PLT relocs
1793 against __tls_get_addr. */
1794 struct bfd_link_hash_entry *bh = NULL;
1795 if (! _bfd_generic_link_add_one_symbol (info, abfd,
1796 "__tls_get_addr", 0,
1797 bfd_und_section_ptr, 0,
1798 NULL, false, false,
1799 &bh))
1800 return false;
1801 h = (struct elf_link_hash_entry *) bh;
1802 }
1803 else
1804 break;
1805 /* Fall through */
1806
1807 case R_TILEGX_JUMPOFF_X1_PLT:
1808 case R_TILEGX_IMM16_X0_HW0_PLT_PCREL:
1809 case R_TILEGX_IMM16_X1_HW0_PLT_PCREL:
1810 case R_TILEGX_IMM16_X0_HW1_PLT_PCREL:
1811 case R_TILEGX_IMM16_X1_HW1_PLT_PCREL:
1812 case R_TILEGX_IMM16_X0_HW2_PLT_PCREL:
1813 case R_TILEGX_IMM16_X1_HW2_PLT_PCREL:
1814 case R_TILEGX_IMM16_X0_HW3_PLT_PCREL:
1815 case R_TILEGX_IMM16_X1_HW3_PLT_PCREL:
1816 case R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL:
1817 case R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL:
1818 case R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL:
1819 case R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL:
1820 case R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL:
1821 case R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL:
1822 /* This symbol requires a procedure linkage table entry. We
1823 actually build the entry in adjust_dynamic_symbol,
1824 because this might be a case of linking PIC code without
1825 linking in any dynamic objects, in which case we don't
1826 need to generate a procedure linkage table after all. */
1827
1828 if (h != NULL)
1829 {
1830 h->needs_plt = 1;
1831 h->plt.refcount += 1;
1832 }
1833 break;
1834
1835 case R_TILEGX_64_PCREL:
1836 case R_TILEGX_32_PCREL:
1837 case R_TILEGX_16_PCREL:
1838 case R_TILEGX_8_PCREL:
1839 case R_TILEGX_IMM16_X0_HW0_PCREL:
1840 case R_TILEGX_IMM16_X1_HW0_PCREL:
1841 case R_TILEGX_IMM16_X0_HW1_PCREL:
1842 case R_TILEGX_IMM16_X1_HW1_PCREL:
1843 case R_TILEGX_IMM16_X0_HW2_PCREL:
1844 case R_TILEGX_IMM16_X1_HW2_PCREL:
1845 case R_TILEGX_IMM16_X0_HW3_PCREL:
1846 case R_TILEGX_IMM16_X1_HW3_PCREL:
1847 case R_TILEGX_IMM16_X0_HW0_LAST_PCREL:
1848 case R_TILEGX_IMM16_X1_HW0_LAST_PCREL:
1849 case R_TILEGX_IMM16_X0_HW1_LAST_PCREL:
1850 case R_TILEGX_IMM16_X1_HW1_LAST_PCREL:
1851 case R_TILEGX_IMM16_X0_HW2_LAST_PCREL:
1852 case R_TILEGX_IMM16_X1_HW2_LAST_PCREL:
1853 if (h != NULL)
1854 h->non_got_ref = 1;
1855
1856 if (h != NULL
1857 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1858 break;
1859 /* Fall through. */
1860
1861 case R_TILEGX_64:
1862 case R_TILEGX_32:
1863 case R_TILEGX_16:
1864 case R_TILEGX_8:
1865 case R_TILEGX_HW0:
1866 case R_TILEGX_HW1:
1867 case R_TILEGX_HW2:
1868 case R_TILEGX_HW3:
1869 case R_TILEGX_HW0_LAST:
1870 case R_TILEGX_HW1_LAST:
1871 case R_TILEGX_HW2_LAST:
1872 case R_TILEGX_COPY:
1873 case R_TILEGX_GLOB_DAT:
1874 case R_TILEGX_JMP_SLOT:
1875 case R_TILEGX_RELATIVE:
1876 case R_TILEGX_BROFF_X1:
1877 case R_TILEGX_JUMPOFF_X1:
1878 case R_TILEGX_IMM8_X0:
1879 case R_TILEGX_IMM8_Y0:
1880 case R_TILEGX_IMM8_X1:
1881 case R_TILEGX_IMM8_Y1:
1882 case R_TILEGX_DEST_IMM8_X1:
1883 case R_TILEGX_MT_IMM14_X1:
1884 case R_TILEGX_MF_IMM14_X1:
1885 case R_TILEGX_MMSTART_X0:
1886 case R_TILEGX_MMEND_X0:
1887 case R_TILEGX_SHAMT_X0:
1888 case R_TILEGX_SHAMT_X1:
1889 case R_TILEGX_SHAMT_Y0:
1890 case R_TILEGX_SHAMT_Y1:
1891 case R_TILEGX_IMM16_X0_HW0:
1892 case R_TILEGX_IMM16_X1_HW0:
1893 case R_TILEGX_IMM16_X0_HW1:
1894 case R_TILEGX_IMM16_X1_HW1:
1895 case R_TILEGX_IMM16_X0_HW2:
1896 case R_TILEGX_IMM16_X1_HW2:
1897 case R_TILEGX_IMM16_X0_HW3:
1898 case R_TILEGX_IMM16_X1_HW3:
1899 case R_TILEGX_IMM16_X0_HW0_LAST:
1900 case R_TILEGX_IMM16_X1_HW0_LAST:
1901 case R_TILEGX_IMM16_X0_HW1_LAST:
1902 case R_TILEGX_IMM16_X1_HW1_LAST:
1903 case R_TILEGX_IMM16_X0_HW2_LAST:
1904 case R_TILEGX_IMM16_X1_HW2_LAST:
1905 if (h != NULL)
1906 h->non_got_ref = 1;
1907
1908 r_tilegx_plt32:
1909 if (h != NULL && !bfd_link_pic (info))
1910 {
1911 /* We may need a .plt entry if the function this reloc
1912 refers to is in a shared lib. */
1913 h->plt.refcount += 1;
1914 }
1915
1916 /* If we are creating a shared library, and this is a reloc
1917 against a global symbol, or a non PC relative reloc
1918 against a local symbol, then we need to copy the reloc
1919 into the shared library. However, if we are linking with
1920 -Bsymbolic, we do not need to copy a reloc against a
1921 global symbol which is defined in an object we are
1922 including in the link (i.e., DEF_REGULAR is set). At
1923 this point we have not seen all the input files, so it is
1924 possible that DEF_REGULAR is not set now but will be set
1925 later (it is never cleared). In case of a weak definition,
1926 DEF_REGULAR may be cleared later by a strong definition in
1927 a shared library. We account for that possibility below by
1928 storing information in the relocs_copied field of the hash
1929 table entry. A similar situation occurs when creating
1930 shared libraries and symbol visibility changes render the
1931 symbol local.
1932
1933 If on the other hand, we are creating an executable, we
1934 may need to keep relocations for symbols satisfied by a
1935 dynamic library if we manage to avoid copy relocs for the
1936 symbol. */
1937 if ((bfd_link_pic (info)
1938 && (sec->flags & SEC_ALLOC) != 0
1939 && (! tilegx_elf_howto_table[r_type].pc_relative
1940 || (h != NULL
1941 && (! info->symbolic
1942 || h->root.type == bfd_link_hash_defweak
1943 || !h->def_regular))))
1944 || (!bfd_link_pic (info)
1945 && (sec->flags & SEC_ALLOC) != 0
1946 && h != NULL
1947 && (h->root.type == bfd_link_hash_defweak
1948 || !h->def_regular)))
1949 {
1950 struct elf_dyn_relocs *p;
1951 struct elf_dyn_relocs **head;
1952
1953 /* When creating a shared object, we must copy these
1954 relocs into the output file. We create a reloc
1955 section in dynobj and make room for the reloc. */
1956 if (sreloc == NULL)
1957 {
1958 sreloc = _bfd_elf_make_dynamic_reloc_section
1959 (sec, htab->elf.dynobj, htab->word_align_power, abfd,
1960 /*rela?*/ true);
1961
1962 if (sreloc == NULL)
1963 return false;
1964 }
1965
1966 /* If this is a global symbol, we count the number of
1967 relocations we need for this symbol. */
1968 if (h != NULL)
1969 head = &h->dyn_relocs;
1970 else
1971 {
1972 /* Track dynamic relocs needed for local syms too.
1973 We really need local syms available to do this
1974 easily. Oh well. */
1975
1976 asection *s;
1977 void *vpp;
1978 Elf_Internal_Sym *isym;
1979
1980 isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache,
1981 abfd, r_symndx);
1982 if (isym == NULL)
1983 return false;
1984
1985 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1986 if (s == NULL)
1987 s = sec;
1988
1989 vpp = &elf_section_data (s)->local_dynrel;
1990 head = (struct elf_dyn_relocs **) vpp;
1991 }
1992
1993 p = *head;
1994 if (p == NULL || p->sec != sec)
1995 {
1996 size_t amt = sizeof *p;
1997 p = ((struct elf_dyn_relocs *)
1998 bfd_alloc (htab->elf.dynobj, amt));
1999 if (p == NULL)
2000 return false;
2001 p->next = *head;
2002 *head = p;
2003 p->sec = sec;
2004 p->count = 0;
2005 p->pc_count = 0;
2006 }
2007
2008 p->count += 1;
2009 if (tilegx_elf_howto_table[r_type].pc_relative)
2010 p->pc_count += 1;
2011 }
2012
2013 break;
2014
2015 case R_TILEGX_GNU_VTINHERIT:
2016 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2017 return false;
2018 break;
2019
2020 case R_TILEGX_GNU_VTENTRY:
2021 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2022 return false;
2023 break;
2024
2025 default:
2026 break;
2027 }
2028 }
2029
2030 return true;
2031 }
2032
2033
2034 asection *
tilegx_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)2035 tilegx_elf_gc_mark_hook (asection *sec,
2036 struct bfd_link_info *info,
2037 Elf_Internal_Rela *rel,
2038 struct elf_link_hash_entry *h,
2039 Elf_Internal_Sym *sym)
2040 {
2041 if (h != NULL)
2042 {
2043 switch (TILEGX_ELF_R_TYPE (rel->r_info))
2044 {
2045 case R_TILEGX_GNU_VTINHERIT:
2046 case R_TILEGX_GNU_VTENTRY:
2047 return NULL;
2048 }
2049 }
2050
2051 /* FIXME: The test here, in check_relocs and in relocate_section
2052 dealing with TLS optimization, ought to be !bfd_link_executable (info). */
2053 if (bfd_link_pic (info))
2054 {
2055 struct bfd_link_hash_entry *bh;
2056
2057 switch (TILEGX_ELF_R_TYPE (rel->r_info))
2058 {
2059 case R_TILEGX_TLS_GD_CALL:
2060 /* This reloc implicitly references __tls_get_addr. We know
2061 another reloc will reference the same symbol as the one
2062 on this reloc, so the real symbol and section will be
2063 gc marked when processing the other reloc. That lets
2064 us handle __tls_get_addr here. */
2065 bh = NULL;
2066 if (! _bfd_generic_link_add_one_symbol (info, sec->owner,
2067 "__tls_get_addr", 0,
2068 bfd_und_section_ptr,
2069 0, NULL, false,
2070 false, &bh))
2071 return NULL;
2072 h = (struct elf_link_hash_entry *) bh;
2073 BFD_ASSERT (h != NULL);
2074 h->mark = 1;
2075 if (h->is_weakalias)
2076 weakdef (h)->mark = 1;
2077 sym = NULL;
2078 }
2079 }
2080
2081 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2082 }
2083
2084 /* Adjust a symbol defined by a dynamic object and referenced by a
2085 regular object. The current definition is in some section of the
2086 dynamic object, but we're not including those sections. We have to
2087 change the definition to something the rest of the link can
2088 understand. */
2089
2090 bool
tilegx_elf_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)2091 tilegx_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2092 struct elf_link_hash_entry *h)
2093 {
2094 struct tilegx_elf_link_hash_table *htab;
2095 bfd *dynobj;
2096 asection *s, *srel;
2097
2098 htab = tilegx_elf_hash_table (info);
2099 BFD_ASSERT (htab != NULL);
2100
2101 dynobj = htab->elf.dynobj;
2102
2103 /* Make sure we know what is going on here. */
2104 BFD_ASSERT (dynobj != NULL
2105 && (h->needs_plt
2106 || h->is_weakalias
2107 || (h->def_dynamic
2108 && h->ref_regular
2109 && !h->def_regular)));
2110
2111 /* If this is a function, put it in the procedure linkage table. We
2112 will fill in the contents of the procedure linkage table later
2113 (although we could actually do it here). */
2114 if (h->type == STT_FUNC || h->needs_plt)
2115 {
2116 if (h->plt.refcount <= 0
2117 || SYMBOL_CALLS_LOCAL (info, h)
2118 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2119 && h->root.type == bfd_link_hash_undefweak))
2120 {
2121 /* This case can occur if we saw a R_TILEGX_JUMPOFF_X1_PLT
2122 reloc in an input file, but the symbol was never referred
2123 to by a dynamic object, or if all references were garbage
2124 collected. In such a case, we don't actually need to build
2125 a procedure linkage table, and we can just do a
2126 R_TILEGX_JUMPOFF_X1 relocation instead. */
2127 h->plt.offset = (bfd_vma) -1;
2128 h->needs_plt = 0;
2129 }
2130
2131 return true;
2132 }
2133 else
2134 h->plt.offset = (bfd_vma) -1;
2135
2136 /* If this is a weak symbol, and there is a real definition, the
2137 processor independent code will have arranged for us to see the
2138 real definition first, and we can just use the same value. */
2139 if (h->is_weakalias)
2140 {
2141 struct elf_link_hash_entry *def = weakdef (h);
2142 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2143 h->root.u.def.section = def->root.u.def.section;
2144 h->root.u.def.value = def->root.u.def.value;
2145 return true;
2146 }
2147
2148 /* This is a reference to a symbol defined by a dynamic object which
2149 is not a function. */
2150
2151 /* If we are creating a shared library, we must presume that the
2152 only references to the symbol are via the global offset table.
2153 For such cases we need not do anything here; the relocations will
2154 be handled correctly by relocate_section. */
2155 if (bfd_link_pic (info))
2156 return true;
2157
2158 /* If there are no references to this symbol that do not use the
2159 GOT, we don't need to generate a copy reloc. */
2160 if (!h->non_got_ref)
2161 return true;
2162
2163 /* If -z nocopyreloc was given, we won't generate them either. */
2164 if (info->nocopyreloc)
2165 {
2166 h->non_got_ref = 0;
2167 return true;
2168 }
2169
2170 /* If we don't find any dynamic relocs in read-only sections, then
2171 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2172 if (!_bfd_elf_readonly_dynrelocs (h))
2173 {
2174 h->non_got_ref = 0;
2175 return true;
2176 }
2177
2178 /* We must allocate the symbol in our .dynbss section, which will
2179 become part of the .bss section of the executable. There will be
2180 an entry for this symbol in the .dynsym section. The dynamic
2181 object will contain position independent code, so all references
2182 from the dynamic object to this symbol will go through the global
2183 offset table. The dynamic linker will use the .dynsym entry to
2184 determine the address it must put in the global offset table, so
2185 both the dynamic object and the regular object will refer to the
2186 same memory location for the variable. */
2187
2188 /* We must generate a R_TILEGX_COPY reloc to tell the dynamic linker
2189 to copy the initial value out of the dynamic object and into the
2190 runtime process image. We need to remember the offset into the
2191 .rel.bss section we are going to use. */
2192 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2193 {
2194 s = htab->elf.sdynrelro;
2195 srel = htab->elf.sreldynrelro;
2196 }
2197 else
2198 {
2199 s = htab->elf.sdynbss;
2200 srel = htab->elf.srelbss;
2201 }
2202 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2203 {
2204 srel->size += TILEGX_ELF_RELA_BYTES (htab);
2205 h->needs_copy = 1;
2206 }
2207
2208 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2209 }
2210
2211 /* Allocate space in .plt, .got and associated reloc sections for
2212 dynamic relocs. */
2213
2214 static bool
allocate_dynrelocs(struct elf_link_hash_entry * h,void * inf)2215 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2216 {
2217 struct bfd_link_info *info;
2218 struct tilegx_elf_link_hash_table *htab;
2219 struct elf_dyn_relocs *p;
2220
2221 if (h->root.type == bfd_link_hash_indirect)
2222 return true;
2223
2224 info = (struct bfd_link_info *) inf;
2225 htab = tilegx_elf_hash_table (info);
2226 BFD_ASSERT (htab != NULL);
2227
2228 if (htab->elf.dynamic_sections_created
2229 && h->plt.refcount > 0)
2230 {
2231 /* Make sure this symbol is output as a dynamic symbol.
2232 Undefined weak syms won't yet be marked as dynamic. */
2233 if (h->dynindx == -1
2234 && !h->forced_local)
2235 {
2236 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2237 return false;
2238 }
2239
2240 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
2241 {
2242 asection *s = htab->elf.splt;
2243
2244 /* Allocate room for the header and tail. */
2245 if (s->size == 0)
2246 {
2247 s->size = PLT_ENTRY_SIZE;
2248 }
2249
2250 h->plt.offset = s->size - PLT_ENTRY_SIZE + PLT_HEADER_SIZE;
2251
2252 /* If this symbol is not defined in a regular file, and we are
2253 not generating a shared library, then set the symbol to this
2254 location in the .plt. This is required to make function
2255 pointers compare as equal between the normal executable and
2256 the shared library. */
2257 if (! bfd_link_pic (info)
2258 && !h->def_regular)
2259 {
2260 h->root.u.def.section = s;
2261 h->root.u.def.value = h->plt.offset;
2262 }
2263
2264 /* Make room for this entry. */
2265 s->size += PLT_ENTRY_SIZE;
2266
2267 /* We also need to make an entry in the .got.plt section. */
2268 htab->elf.sgotplt->size += GOT_ENTRY_SIZE (htab);
2269
2270 /* We also need to make an entry in the .rela.plt section. */
2271 htab->elf.srelplt->size += TILEGX_ELF_RELA_BYTES (htab);
2272 }
2273 else
2274 {
2275 h->plt.offset = (bfd_vma) -1;
2276 h->needs_plt = 0;
2277 }
2278 }
2279 else
2280 {
2281 h->plt.offset = (bfd_vma) -1;
2282 h->needs_plt = 0;
2283 }
2284
2285 /* If a TLS_IE symbol is now local to the binary, make it a TLS_LE
2286 requiring no TLS entry. */
2287 if (h->got.refcount > 0
2288 && !htab->disable_le_transition
2289 && bfd_link_executable (info)
2290 && h->dynindx == -1
2291 && tilegx_elf_hash_entry(h)->tls_type == GOT_TLS_IE)
2292 h->got.offset = (bfd_vma) -1;
2293 else if (h->got.refcount > 0)
2294 {
2295 asection *s;
2296 bool dyn;
2297 int tls_type = tilegx_elf_hash_entry(h)->tls_type;
2298
2299 /* Make sure this symbol is output as a dynamic symbol.
2300 Undefined weak syms won't yet be marked as dynamic. */
2301 if (h->dynindx == -1
2302 && !h->forced_local)
2303 {
2304 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2305 return false;
2306 }
2307
2308 s = htab->elf.sgot;
2309 h->got.offset = s->size;
2310 s->size += TILEGX_ELF_WORD_BYTES (htab);
2311 /* TLS_GD entries need 2 consecutive GOT slots. */
2312 if (tls_type == GOT_TLS_GD)
2313 s->size += TILEGX_ELF_WORD_BYTES (htab);
2314 dyn = htab->elf.dynamic_sections_created;
2315 /* TLS_IE needs one dynamic relocation,
2316 TLS_GD needs two if local symbol and two if global. */
2317 if (tls_type == GOT_TLS_GD || tls_type == GOT_TLS_IE)
2318 htab->elf.srelgot->size += 2 * TILEGX_ELF_RELA_BYTES (htab);
2319 else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2320 bfd_link_pic (info),
2321 h))
2322 htab->elf.srelgot->size += TILEGX_ELF_RELA_BYTES (htab);
2323 }
2324 else
2325 h->got.offset = (bfd_vma) -1;
2326
2327 if (h->dyn_relocs == NULL)
2328 return true;
2329
2330 /* In the shared -Bsymbolic case, discard space allocated for
2331 dynamic pc-relative relocs against symbols which turn out to be
2332 defined in regular objects. For the normal shared case, discard
2333 space for pc-relative relocs that have become local due to symbol
2334 visibility changes. */
2335
2336 if (bfd_link_pic (info))
2337 {
2338 if (SYMBOL_CALLS_LOCAL (info, h))
2339 {
2340 struct elf_dyn_relocs **pp;
2341
2342 for (pp = &h->dyn_relocs; (p = *pp) != NULL; )
2343 {
2344 p->count -= p->pc_count;
2345 p->pc_count = 0;
2346 if (p->count == 0)
2347 *pp = p->next;
2348 else
2349 pp = &p->next;
2350 }
2351 }
2352
2353 /* Also discard relocs on undefined weak syms with non-default
2354 visibility. */
2355 if (h->dyn_relocs != NULL
2356 && h->root.type == bfd_link_hash_undefweak)
2357 {
2358 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2359 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
2360 h->dyn_relocs = NULL;
2361
2362 /* Make sure undefined weak symbols are output as a dynamic
2363 symbol in PIEs. */
2364 else if (h->dynindx == -1
2365 && !h->forced_local)
2366 {
2367 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2368 return false;
2369 }
2370 }
2371 }
2372 else
2373 {
2374 /* For the non-shared case, discard space for relocs against
2375 symbols which turn out to need copy relocs or are not
2376 dynamic. */
2377
2378 if (!h->non_got_ref
2379 && ((h->def_dynamic
2380 && !h->def_regular)
2381 || (htab->elf.dynamic_sections_created
2382 && (h->root.type == bfd_link_hash_undefweak
2383 || h->root.type == bfd_link_hash_undefined))))
2384 {
2385 /* Make sure this symbol is output as a dynamic symbol.
2386 Undefined weak syms won't yet be marked as dynamic. */
2387 if (h->dynindx == -1
2388 && !h->forced_local)
2389 {
2390 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2391 return false;
2392 }
2393
2394 /* If that succeeded, we know we'll be keeping all the
2395 relocs. */
2396 if (h->dynindx != -1)
2397 goto keep;
2398 }
2399
2400 h->dyn_relocs = NULL;
2401
2402 keep: ;
2403 }
2404
2405 /* Finally, allocate space. */
2406 for (p = h->dyn_relocs; p != NULL; p = p->next)
2407 {
2408 asection *sreloc = elf_section_data (p->sec)->sreloc;
2409 sreloc->size += p->count * TILEGX_ELF_RELA_BYTES (htab);
2410 }
2411
2412 return true;
2413 }
2414
2415 /* Return true if the dynamic symbol for a given section should be
2416 omitted when creating a shared library. */
2417
2418 bool
tilegx_elf_omit_section_dynsym(bfd * output_bfd,struct bfd_link_info * info,asection * p)2419 tilegx_elf_omit_section_dynsym (bfd *output_bfd,
2420 struct bfd_link_info *info,
2421 asection *p)
2422 {
2423 /* We keep the .got section symbol so that explicit relocations
2424 against the _GLOBAL_OFFSET_TABLE_ symbol emitted in PIC mode
2425 can be turned into relocations against the .got symbol. */
2426 if (strcmp (p->name, ".got") == 0)
2427 return false;
2428
2429 return _bfd_elf_omit_section_dynsym_default (output_bfd, info, p);
2430 }
2431
2432 bool
tilegx_elf_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)2433 tilegx_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2434 struct bfd_link_info *info)
2435 {
2436 struct tilegx_elf_link_hash_table *htab;
2437 bfd *dynobj;
2438 asection *s;
2439 bfd *ibfd;
2440
2441 htab = tilegx_elf_hash_table (info);
2442 BFD_ASSERT (htab != NULL);
2443 dynobj = htab->elf.dynobj;
2444 BFD_ASSERT (dynobj != NULL);
2445
2446 if (elf_hash_table (info)->dynamic_sections_created)
2447 {
2448 /* Set the contents of the .interp section to the interpreter. */
2449 if (bfd_link_executable (info) && !info->nointerp)
2450 {
2451 s = bfd_get_linker_section (dynobj, ".interp");
2452 BFD_ASSERT (s != NULL);
2453 s->size = strlen (htab->dynamic_interpreter) + 1;
2454 s->contents = (unsigned char *) htab->dynamic_interpreter;
2455 }
2456 }
2457
2458 /* Set up .got offsets for local syms, and space for local dynamic
2459 relocs. */
2460 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2461 {
2462 bfd_signed_vma *local_got;
2463 bfd_signed_vma *end_local_got;
2464 char *local_tls_type;
2465 bfd_size_type locsymcount;
2466 Elf_Internal_Shdr *symtab_hdr;
2467 asection *srel;
2468
2469 if (! is_tilegx_elf (ibfd))
2470 continue;
2471
2472 for (s = ibfd->sections; s != NULL; s = s->next)
2473 {
2474 struct elf_dyn_relocs *p;
2475
2476 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2477 {
2478 if (!bfd_is_abs_section (p->sec)
2479 && bfd_is_abs_section (p->sec->output_section))
2480 {
2481 /* Input section has been discarded, either because
2482 it is a copy of a linkonce section or due to
2483 linker script /DISCARD/, so we'll be discarding
2484 the relocs too. */
2485 }
2486 else if (p->count != 0)
2487 {
2488 srel = elf_section_data (p->sec)->sreloc;
2489 srel->size += p->count * TILEGX_ELF_RELA_BYTES (htab);
2490 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2491 {
2492 info->flags |= DF_TEXTREL;
2493
2494 info->callbacks->minfo (_("%pB: dynamic relocation in read-only section `%pA'\n"),
2495 p->sec->owner, p->sec);
2496 }
2497 }
2498 }
2499 }
2500
2501 local_got = elf_local_got_refcounts (ibfd);
2502 if (!local_got)
2503 continue;
2504
2505 symtab_hdr = &elf_symtab_hdr (ibfd);
2506 locsymcount = symtab_hdr->sh_info;
2507 end_local_got = local_got + locsymcount;
2508 local_tls_type = _bfd_tilegx_elf_local_got_tls_type (ibfd);
2509 s = htab->elf.sgot;
2510 srel = htab->elf.srelgot;
2511 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2512 {
2513 if (*local_got > 0)
2514 {
2515 *local_got = s->size;
2516 s->size += TILEGX_ELF_WORD_BYTES (htab);
2517 if (*local_tls_type == GOT_TLS_GD)
2518 s->size += TILEGX_ELF_WORD_BYTES (htab);
2519 if (bfd_link_pic (info)
2520 || *local_tls_type == GOT_TLS_GD
2521 || *local_tls_type == GOT_TLS_IE)
2522 srel->size += TILEGX_ELF_RELA_BYTES (htab);
2523 }
2524 else
2525 *local_got = (bfd_vma) -1;
2526 }
2527 }
2528
2529 /* Allocate global sym .plt and .got entries, and space for global
2530 sym dynamic relocs. */
2531 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2532
2533 if (elf_hash_table (info)->dynamic_sections_created)
2534 {
2535 /* If the .got section is more than 0x8000 bytes, we add
2536 0x8000 to the value of _GLOBAL_OFFSET_TABLE_, so that 16
2537 bit relocations have a greater chance of working. */
2538 if (htab->elf.sgot->size >= 0x8000
2539 && elf_hash_table (info)->hgot->root.u.def.value == 0)
2540 elf_hash_table (info)->hgot->root.u.def.value = 0x8000;
2541 }
2542
2543 if (htab->elf.sgotplt)
2544 {
2545 struct elf_link_hash_entry *got;
2546 got = elf_link_hash_lookup (elf_hash_table (info),
2547 "_GLOBAL_OFFSET_TABLE_",
2548 false, false, false);
2549
2550 /* Don't allocate .got.plt section if there are no GOT nor PLT
2551 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2552 if ((got == NULL
2553 || !got->ref_regular_nonweak)
2554 && (htab->elf.sgotplt->size
2555 == (unsigned)GOTPLT_HEADER_SIZE (htab))
2556 && (htab->elf.splt == NULL
2557 || htab->elf.splt->size == 0)
2558 && (htab->elf.sgot == NULL
2559 || (htab->elf.sgot->size
2560 == get_elf_backend_data (output_bfd)->got_header_size)))
2561 htab->elf.sgotplt->size = 0;
2562 }
2563
2564 /* The check_relocs and adjust_dynamic_symbol entry points have
2565 determined the sizes of the various dynamic sections. Allocate
2566 memory for them. */
2567 for (s = dynobj->sections; s != NULL; s = s->next)
2568 {
2569 if ((s->flags & SEC_LINKER_CREATED) == 0)
2570 continue;
2571
2572 if (s == htab->elf.splt
2573 || s == htab->elf.sgot
2574 || s == htab->elf.sgotplt
2575 || s == htab->elf.sdynbss
2576 || s == htab->elf.sdynrelro)
2577 {
2578 /* Strip this section if we don't need it; see the
2579 comment below. */
2580 }
2581 else if (startswith (s->name, ".rela"))
2582 {
2583 if (s->size != 0)
2584 {
2585 /* We use the reloc_count field as a counter if we need
2586 to copy relocs into the output file. */
2587 s->reloc_count = 0;
2588 }
2589 }
2590 else
2591 {
2592 /* It's not one of our sections. */
2593 continue;
2594 }
2595
2596 if (s->size == 0)
2597 {
2598 /* If we don't need this section, strip it from the
2599 output file. This is mostly to handle .rela.bss and
2600 .rela.plt. We must create both sections in
2601 create_dynamic_sections, because they must be created
2602 before the linker maps input sections to output
2603 sections. The linker does that before
2604 adjust_dynamic_symbol is called, and it is that
2605 function which decides whether anything needs to go
2606 into these sections. */
2607 s->flags |= SEC_EXCLUDE;
2608 continue;
2609 }
2610
2611 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2612 continue;
2613
2614 /* Allocate memory for the section contents. Zero the memory
2615 for the benefit of .rela.plt, which has 4 unused entries
2616 at the beginning, and we don't want garbage. */
2617 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2618 if (s->contents == NULL)
2619 return false;
2620 }
2621
2622 return _bfd_elf_add_dynamic_tags (output_bfd, info, true);
2623 }
2624
2625 /* Return the base VMA address which should be subtracted from real addresses
2626 when resolving @dtpoff relocation.
2627 This is PT_TLS segment p_vaddr. */
2628
2629 static bfd_vma
dtpoff_base(struct bfd_link_info * info)2630 dtpoff_base (struct bfd_link_info *info)
2631 {
2632 /* If tls_sec is NULL, we should have signalled an error already. */
2633 if (elf_hash_table (info)->tls_sec == NULL)
2634 return 0;
2635 return elf_hash_table (info)->tls_sec->vma;
2636 }
2637
2638 /* Return the relocation value for @tpoff relocation. */
2639
2640 static bfd_vma
tpoff(struct bfd_link_info * info,bfd_vma address)2641 tpoff (struct bfd_link_info *info, bfd_vma address)
2642 {
2643 struct elf_link_hash_table *htab = elf_hash_table (info);
2644
2645 /* If tls_sec is NULL, we should have signalled an error already. */
2646 if (htab->tls_sec == NULL)
2647 return 0;
2648
2649 return (address - htab->tls_sec->vma);
2650 }
2651
2652 /* Copy SIZE bits from FROM to TO at address ADDR. */
2653
2654 static void
tilegx_copy_bits(bfd_byte * addr,int from,int to,int size)2655 tilegx_copy_bits (bfd_byte *addr, int from, int to, int size)
2656 {
2657 int i;
2658 for (i = 0; i < size; i++)
2659 {
2660 int from_byte = (from + i) / 8;
2661 int from_bit = (from + i) % 8;
2662 int to_byte = (to + i) / 8;
2663 int to_bit = (to + i) % 8;
2664 bfd_byte to_mask = 1 << to_bit;
2665 addr[to_byte] = (addr[to_byte] & ~to_mask)
2666 | ((addr[from_byte] >> from_bit << to_bit) & to_mask);
2667 }
2668 }
2669
2670 /* Replace the MASK bits in ADDR with those in INSN, for the next
2671 TILEGX_BUNDLE_SIZE_IN_BYTES bytes. */
2672
2673 static void
tilegx_replace_insn(bfd_byte * addr,const bfd_byte * mask,const bfd_byte * insn)2674 tilegx_replace_insn (bfd_byte *addr, const bfd_byte *mask,
2675 const bfd_byte *insn)
2676 {
2677 int i;
2678 for (i = 0; i < TILEGX_BUNDLE_SIZE_IN_BYTES; i++)
2679 {
2680 addr[i] = (addr[i] & ~mask[i]) | (insn[i] & mask[i]);
2681 }
2682 }
2683
2684 /* Mask to extract the bits corresponding to an instruction in a
2685 specific pipe of a bundle. */
2686 static const bfd_byte insn_mask_X1[] = {
2687 0x00, 0x00, 0x00, 0x80, 0xff, 0xff, 0xff, 0x3f
2688 };
2689
2690 /* Mask to extract the bits corresponding to an instruction in a
2691 specific pipe of a bundle, minus the destination operand and the
2692 first source operand. */
2693 static const bfd_byte insn_mask_X0_no_dest_no_srca[] = {
2694 0x00, 0xf0, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00
2695 };
2696
2697 static const bfd_byte insn_mask_X1_no_dest_no_srca[] = {
2698 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0xff, 0x3f
2699 };
2700
2701 static const bfd_byte insn_mask_Y0_no_dest_no_srca[] = {
2702 0x00, 0xf0, 0x0f, 0x78, 0x00, 0x00, 0x00, 0x00
2703 };
2704 static const bfd_byte insn_mask_Y1_no_dest_no_srca[] = {
2705 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x07, 0x3c
2706 };
2707
2708 /* Mask to extract the bits corresponding to an instruction in a
2709 specific pipe of a bundle, minus the register operands. */
2710 static const bfd_byte insn_mask_X0_no_operand[] = {
2711 0x00, 0x00, 0xfc, 0x7f, 0x00, 0x00, 0x00, 0x00
2712 };
2713
2714 static const bfd_byte insn_mask_X1_no_operand[] = {
2715 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x3f
2716 };
2717
2718 static const bfd_byte insn_mask_Y0_no_operand[] = {
2719 0x00, 0x00, 0x0c, 0x78, 0x00, 0x00, 0x00, 0x00
2720 };
2721
2722 static const bfd_byte insn_mask_Y1_no_operand[] = {
2723 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x3c
2724 };
2725
2726 /* Various instructions synthesized to support tls references. */
2727
2728 /* ld r0, r0 in the X1 pipe, used for tls ie. */
2729 static const bfd_byte insn_tls_ie_ld_X1[] = {
2730 0x00, 0x00, 0x00, 0x00, 0x00, 0xe8, 0x6a, 0x28
2731 };
2732
2733 /* ld4s r0, r0 in the X1 pipe, used for tls ie. */
2734 static const bfd_byte insn_tls_ie_ld4s_X1[] = {
2735 0x00, 0x00, 0x00, 0x00, 0x00, 0x98, 0x6a, 0x28
2736 };
2737
2738 /* add r0, r0, tp in various pipes, used for tls ie. */
2739 static const bfd_byte insn_tls_ie_add_X0X1[] = {
2740 0x00, 0x50, 0x0f, 0x50, 0x00, 0xa8, 0x07, 0x28
2741 };
2742 static const bfd_byte insn_tls_ie_add_Y0Y1[] = {
2743 0x00, 0x50, 0x27, 0x2c, 0x00, 0xa8, 0x13, 0x9a
2744 };
2745
2746 /* addx r0, r0, tp in various pipes, used for tls ie. */
2747 static const bfd_byte insn_tls_ie_addx_X0X1[] = {
2748 0x00, 0x50, 0x0b, 0x50, 0x00, 0xa8, 0x05, 0x28
2749 };
2750 static const bfd_byte insn_tls_ie_addx_Y0Y1[] = {
2751 0x00, 0x50, 0x03, 0x2c, 0x00, 0xa8, 0x01, 0x9a
2752 };
2753
2754 /* move r0, r0 in various pipes, used for tls gd. */
2755 static const bfd_byte insn_tls_gd_add_X0X1[] = {
2756 0x00, 0xf0, 0x07, 0x51, 0x00, 0xf8, 0x3b, 0x28
2757 };
2758 static const bfd_byte insn_tls_gd_add_Y0Y1[] = {
2759 0x00, 0xf0, 0x0b, 0x54, 0x00, 0xf8, 0x05, 0xae
2760 };
2761
2762 static const bfd_byte *insn_move_X0X1 = insn_tls_gd_add_X0X1;
2763 static const bfd_byte *insn_move_Y0Y1 = insn_tls_gd_add_Y0Y1;
2764
2765 static const bfd_byte *insn_add_X0X1 = insn_tls_ie_add_X0X1;
2766 static const bfd_byte *insn_add_Y0Y1 = insn_tls_ie_add_Y0Y1;
2767
2768 static const bfd_byte *insn_addx_X0X1 = insn_tls_ie_addx_X0X1;
2769 static const bfd_byte *insn_addx_Y0Y1 = insn_tls_ie_addx_Y0Y1;
2770
2771 /* Relocate an TILEGX ELF section.
2772
2773 The RELOCATE_SECTION function is called by the new ELF backend linker
2774 to handle the relocations for a section.
2775
2776 The relocs are always passed as Rela structures.
2777
2778 This function is responsible for adjusting the section contents as
2779 necessary, and (if generating a relocatable output file) adjusting
2780 the reloc addend as necessary.
2781
2782 This function does not have to worry about setting the reloc
2783 address or the reloc symbol index.
2784
2785 LOCAL_SYMS is a pointer to the swapped in local symbols.
2786
2787 LOCAL_SECTIONS is an array giving the section in the input file
2788 corresponding to the st_shndx field of each local symbol.
2789
2790 The global hash table entry for the global symbols can be found
2791 via elf_sym_hashes (input_bfd).
2792
2793 When generating relocatable output, this function must handle
2794 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2795 going to be the section symbol corresponding to the output
2796 section, which means that the addend must be adjusted
2797 accordingly. */
2798
2799 int
tilegx_elf_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)2800 tilegx_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
2801 bfd *input_bfd, asection *input_section,
2802 bfd_byte *contents, Elf_Internal_Rela *relocs,
2803 Elf_Internal_Sym *local_syms,
2804 asection **local_sections)
2805 {
2806 struct tilegx_elf_link_hash_table *htab;
2807 Elf_Internal_Shdr *symtab_hdr;
2808 struct elf_link_hash_entry **sym_hashes;
2809 bfd_vma *local_got_offsets;
2810 bfd_vma got_base;
2811 asection *sreloc;
2812 Elf_Internal_Rela *rel;
2813 Elf_Internal_Rela *relend;
2814 int num_relocs;
2815
2816 htab = tilegx_elf_hash_table (info);
2817 BFD_ASSERT (htab != NULL);
2818 symtab_hdr = &elf_symtab_hdr (input_bfd);
2819 sym_hashes = elf_sym_hashes (input_bfd);
2820 local_got_offsets = elf_local_got_offsets (input_bfd);
2821
2822 if (elf_hash_table (info)->hgot == NULL)
2823 got_base = 0;
2824 else
2825 got_base = elf_hash_table (info)->hgot->root.u.def.value;
2826
2827 sreloc = elf_section_data (input_section)->sreloc;
2828
2829 rel = relocs;
2830 num_relocs = input_section->reloc_count;
2831 relend = relocs + num_relocs;
2832 for (; rel < relend; rel++)
2833 {
2834 int r_type, tls_type;
2835 bool is_tls_iele, is_tls_le;
2836 reloc_howto_type *howto;
2837 unsigned long r_symndx;
2838 struct elf_link_hash_entry *h;
2839 Elf_Internal_Sym *sym;
2840 tilegx_create_func create_func;
2841 asection *sec;
2842 bfd_vma relocation;
2843 bfd_reloc_status_type r;
2844 const char *name;
2845 bfd_vma off;
2846 bool is_plt = false;
2847 bool resolved_to_zero;
2848 bool unresolved_reloc;
2849
2850 r_type = TILEGX_ELF_R_TYPE (rel->r_info);
2851 if (r_type == R_TILEGX_GNU_VTINHERIT
2852 || r_type == R_TILEGX_GNU_VTENTRY)
2853 continue;
2854
2855 if ((unsigned int)r_type >= ARRAY_SIZE (tilegx_elf_howto_table))
2856 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2857
2858 howto = tilegx_elf_howto_table + r_type;
2859
2860 /* This is a final link. */
2861 r_symndx = TILEGX_ELF_R_SYMNDX (htab, rel->r_info);
2862 h = NULL;
2863 sym = NULL;
2864 sec = NULL;
2865 unresolved_reloc = false;
2866 if (r_symndx < symtab_hdr->sh_info)
2867 {
2868 sym = local_syms + r_symndx;
2869 sec = local_sections[r_symndx];
2870 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2871 }
2872 else
2873 {
2874 bool warned ATTRIBUTE_UNUSED;
2875 bool ignored ATTRIBUTE_UNUSED;
2876
2877 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2878 r_symndx, symtab_hdr, sym_hashes,
2879 h, sec, relocation,
2880 unresolved_reloc, warned, ignored);
2881 if (warned)
2882 {
2883 /* To avoid generating warning messages about truncated
2884 relocations, set the relocation's address to be the same as
2885 the start of this section. */
2886 if (input_section->output_section != NULL)
2887 relocation = input_section->output_section->vma;
2888 else
2889 relocation = 0;
2890 }
2891 }
2892
2893 if (sec != NULL && discarded_section (sec))
2894 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2895 rel, 1, relend, howto, 0, contents);
2896
2897 if (bfd_link_relocatable (info))
2898 continue;
2899
2900 if (h != NULL)
2901 name = h->root.root.string;
2902 else
2903 {
2904 name = (bfd_elf_string_from_elf_section
2905 (input_bfd, symtab_hdr->sh_link, sym->st_name));
2906 if (name == NULL || *name == '\0')
2907 name = bfd_section_name (sec);
2908 }
2909
2910 switch (r_type)
2911 {
2912 case R_TILEGX_TLS_GD_CALL:
2913 case R_TILEGX_IMM8_X0_TLS_GD_ADD:
2914 case R_TILEGX_IMM8_Y0_TLS_GD_ADD:
2915 case R_TILEGX_IMM8_X1_TLS_GD_ADD:
2916 case R_TILEGX_IMM8_Y1_TLS_GD_ADD:
2917 case R_TILEGX_IMM8_X0_TLS_ADD:
2918 case R_TILEGX_IMM8_Y0_TLS_ADD:
2919 case R_TILEGX_IMM8_X1_TLS_ADD:
2920 case R_TILEGX_IMM8_Y1_TLS_ADD:
2921 tls_type = GOT_UNKNOWN;
2922 if (h == NULL && local_got_offsets)
2923 tls_type =
2924 _bfd_tilegx_elf_local_got_tls_type (input_bfd) [r_symndx];
2925 else if (h != NULL)
2926 tls_type = tilegx_elf_hash_entry(h)->tls_type;
2927
2928 is_tls_iele = (bfd_link_executable (info) || tls_type == GOT_TLS_IE);
2929 is_tls_le = is_tls_iele && (!input_section->sec_flg0
2930 && bfd_link_executable (info)
2931 && (h == NULL || h->dynindx == -1));
2932
2933 if (r_type == R_TILEGX_TLS_GD_CALL)
2934 {
2935 if (is_tls_le)
2936 {
2937 /* GD -> LE */
2938 tilegx_replace_insn (contents + rel->r_offset,
2939 insn_mask_X1, insn_move_X0X1);
2940 continue;
2941 }
2942 else if (is_tls_iele)
2943 {
2944 /* GD -> IE */
2945 if (ABI_64_P (output_bfd))
2946 tilegx_replace_insn (contents + rel->r_offset,
2947 insn_mask_X1, insn_tls_ie_ld_X1);
2948 else
2949 tilegx_replace_insn (contents + rel->r_offset,
2950 insn_mask_X1, insn_tls_ie_ld4s_X1);
2951 continue;
2952 }
2953
2954 /* GD -> GD */
2955 h = (struct elf_link_hash_entry *)
2956 bfd_link_hash_lookup (info->hash, "__tls_get_addr", false,
2957 false, true);
2958 BFD_ASSERT (h != NULL);
2959 r_type = R_TILEGX_JUMPOFF_X1_PLT;
2960 howto = tilegx_elf_howto_table + r_type;
2961 }
2962 else if (r_type == R_TILEGX_IMM8_X0_TLS_ADD
2963 || r_type == R_TILEGX_IMM8_X1_TLS_ADD
2964 || r_type == R_TILEGX_IMM8_Y0_TLS_ADD
2965 || r_type == R_TILEGX_IMM8_Y1_TLS_ADD)
2966 {
2967 bool is_pipe0 =
2968 (r_type == R_TILEGX_IMM8_X0_TLS_ADD
2969 || r_type == R_TILEGX_IMM8_Y0_TLS_ADD);
2970 bool is_X0X1 =
2971 (r_type == R_TILEGX_IMM8_X0_TLS_ADD
2972 || r_type == R_TILEGX_IMM8_X1_TLS_ADD);
2973 int dest_begin = is_pipe0 ? 0 : 31;
2974 int src_begin;
2975 const bfd_byte *insn;
2976 const bfd_byte *mask = NULL;
2977
2978 if (is_tls_le)
2979 {
2980 /* 1. copy dest operand into the first source operand.
2981 2. change the opcode to "move". */
2982 src_begin = is_pipe0 ? 6 : 37;
2983 insn = is_X0X1 ? insn_move_X0X1 : insn_move_Y0Y1;
2984
2985 switch (r_type)
2986 {
2987 case R_TILEGX_IMM8_X0_TLS_ADD:
2988 mask = insn_mask_X0_no_dest_no_srca;
2989 break;
2990 case R_TILEGX_IMM8_X1_TLS_ADD:
2991 mask = insn_mask_X1_no_dest_no_srca;
2992 break;
2993 case R_TILEGX_IMM8_Y0_TLS_ADD:
2994 mask = insn_mask_Y0_no_dest_no_srca;
2995 break;
2996 case R_TILEGX_IMM8_Y1_TLS_ADD:
2997 mask = insn_mask_Y1_no_dest_no_srca;
2998 break;
2999 }
3000 }
3001 else
3002 {
3003 /* 1. copy dest operand into the second source operand.
3004 2. change the opcode to "add". */
3005 src_begin = is_pipe0 ? 12 : 43;
3006 if (ABI_64_P (output_bfd))
3007 insn = is_X0X1 ? insn_add_X0X1 : insn_add_Y0Y1;
3008 else
3009 insn = is_X0X1 ? insn_addx_X0X1 : insn_addx_Y0Y1;
3010
3011 switch (r_type)
3012 {
3013 case R_TILEGX_IMM8_X0_TLS_ADD:
3014 mask = insn_mask_X0_no_operand;
3015 break;
3016 case R_TILEGX_IMM8_X1_TLS_ADD:
3017 mask = insn_mask_X1_no_operand;
3018 break;
3019 case R_TILEGX_IMM8_Y0_TLS_ADD:
3020 mask = insn_mask_Y0_no_operand;
3021 break;
3022 case R_TILEGX_IMM8_Y1_TLS_ADD:
3023 mask = insn_mask_Y1_no_operand;
3024 break;
3025 }
3026 }
3027
3028 tilegx_copy_bits (contents + rel->r_offset, dest_begin,
3029 src_begin, 6);
3030 tilegx_replace_insn (contents + rel->r_offset, mask, insn);
3031
3032 continue;
3033 }
3034 else
3035 {
3036 const bfd_byte *mask = NULL;
3037 const bfd_byte *add_insn = NULL;
3038 bool is_64bit = ABI_64_P (output_bfd);
3039
3040 switch (r_type)
3041 {
3042 case R_TILEGX_IMM8_X0_TLS_GD_ADD:
3043 add_insn = is_tls_iele
3044 ? (is_64bit ? insn_tls_ie_add_X0X1 : insn_tls_ie_addx_X0X1)
3045 : insn_tls_gd_add_X0X1;
3046 mask = insn_mask_X0_no_dest_no_srca;
3047 break;
3048 case R_TILEGX_IMM8_X1_TLS_GD_ADD:
3049 add_insn = is_tls_iele
3050 ? (is_64bit ? insn_tls_ie_add_X0X1 : insn_tls_ie_addx_X0X1)
3051 : insn_tls_gd_add_X0X1;
3052 mask = insn_mask_X1_no_dest_no_srca;
3053 break;
3054 case R_TILEGX_IMM8_Y0_TLS_GD_ADD:
3055 add_insn = is_tls_iele
3056 ? (is_64bit ? insn_tls_ie_add_Y0Y1 : insn_tls_ie_addx_Y0Y1)
3057 : insn_tls_gd_add_Y0Y1;
3058 mask = insn_mask_Y0_no_dest_no_srca;
3059 break;
3060 case R_TILEGX_IMM8_Y1_TLS_GD_ADD:
3061 add_insn = is_tls_iele
3062 ? (is_64bit ? insn_tls_ie_add_Y0Y1 : insn_tls_ie_addx_Y0Y1)
3063 : insn_tls_gd_add_Y0Y1;
3064 mask = insn_mask_Y1_no_dest_no_srca;
3065 break;
3066 }
3067
3068 tilegx_replace_insn (contents + rel->r_offset, mask, add_insn);
3069
3070 continue;
3071 }
3072 break;
3073 case R_TILEGX_TLS_IE_LOAD:
3074 if (!input_section->sec_flg0
3075 && bfd_link_executable (info)
3076 && (h == NULL || h->dynindx == -1))
3077 {
3078 /* IE -> LE */
3079 tilegx_replace_insn (contents + rel->r_offset,
3080 insn_mask_X1_no_dest_no_srca,
3081 insn_move_X0X1);
3082 }
3083 else
3084 {
3085 /* IE -> IE */
3086 if (ABI_64_P (output_bfd))
3087 tilegx_replace_insn (contents + rel->r_offset,
3088 insn_mask_X1_no_dest_no_srca,
3089 insn_tls_ie_ld_X1);
3090 else
3091 tilegx_replace_insn (contents + rel->r_offset,
3092 insn_mask_X1_no_dest_no_srca,
3093 insn_tls_ie_ld4s_X1);
3094 }
3095 continue;
3096 break;
3097 default:
3098 break;
3099 }
3100
3101 resolved_to_zero = (h != NULL
3102 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
3103
3104 switch (r_type)
3105 {
3106 case R_TILEGX_IMM16_X0_HW0_GOT:
3107 case R_TILEGX_IMM16_X1_HW0_GOT:
3108 case R_TILEGX_IMM16_X0_HW0_LAST_GOT:
3109 case R_TILEGX_IMM16_X1_HW0_LAST_GOT:
3110 case R_TILEGX_IMM16_X0_HW1_LAST_GOT:
3111 case R_TILEGX_IMM16_X1_HW1_LAST_GOT:
3112 /* Relocation is to the entry for this symbol in the global
3113 offset table. */
3114 if (htab->elf.sgot == NULL)
3115 abort ();
3116
3117 if (h != NULL)
3118 {
3119 bool dyn;
3120
3121 off = h->got.offset;
3122 BFD_ASSERT (off != (bfd_vma) -1);
3123 dyn = elf_hash_table (info)->dynamic_sections_created;
3124
3125 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3126 bfd_link_pic (info),
3127 h)
3128 || (bfd_link_pic (info)
3129 && SYMBOL_REFERENCES_LOCAL (info, h)))
3130 {
3131 /* This is actually a static link, or it is a
3132 -Bsymbolic link and the symbol is defined
3133 locally, or the symbol was forced to be local
3134 because of a version file. We must initialize
3135 this entry in the global offset table. Since the
3136 offset must always be a multiple
3137 of 8 for 64-bit, we use the least significant bit
3138 to record whether we have initialized it already.
3139
3140 When doing a dynamic link, we create a .rela.got
3141 relocation entry to initialize the value. This
3142 is done in the finish_dynamic_symbol routine. */
3143 if ((off & 1) != 0)
3144 off &= ~1;
3145 else
3146 {
3147 TILEGX_ELF_PUT_WORD (htab, output_bfd, relocation,
3148 htab->elf.sgot->contents + off);
3149 h->got.offset |= 1;
3150 }
3151 }
3152 else
3153 unresolved_reloc = false;
3154 }
3155 else
3156 {
3157 BFD_ASSERT (local_got_offsets != NULL
3158 && local_got_offsets[r_symndx] != (bfd_vma) -1);
3159
3160 off = local_got_offsets[r_symndx];
3161
3162 /* The offset must always be a multiple of 8 on 64-bit.
3163 We use the least significant bit to record
3164 whether we have already processed this entry. */
3165 if ((off & 1) != 0)
3166 off &= ~1;
3167 else
3168 {
3169 if (bfd_link_pic (info))
3170 {
3171 asection *s;
3172 Elf_Internal_Rela outrel;
3173
3174 /* We need to generate a R_TILEGX_RELATIVE reloc
3175 for the dynamic linker. */
3176 s = htab->elf.srelgot;
3177 BFD_ASSERT (s != NULL);
3178
3179 outrel.r_offset = (htab->elf.sgot->output_section->vma
3180 + htab->elf.sgot->output_offset
3181 + off);
3182 outrel.r_info =
3183 TILEGX_ELF_R_INFO (htab, NULL, 0, R_TILEGX_RELATIVE);
3184 outrel.r_addend = relocation;
3185 relocation = 0;
3186 tilegx_elf_append_rela (output_bfd, s, &outrel);
3187 }
3188
3189 TILEGX_ELF_PUT_WORD (htab, output_bfd, relocation,
3190 htab->elf.sgot->contents + off);
3191 local_got_offsets[r_symndx] |= 1;
3192 }
3193 }
3194 relocation = off - got_base;
3195 break;
3196
3197 case R_TILEGX_JUMPOFF_X1_PLT:
3198 case R_TILEGX_IMM16_X0_HW0_PLT_PCREL:
3199 case R_TILEGX_IMM16_X1_HW0_PLT_PCREL:
3200 case R_TILEGX_IMM16_X0_HW1_PLT_PCREL:
3201 case R_TILEGX_IMM16_X1_HW1_PLT_PCREL:
3202 case R_TILEGX_IMM16_X0_HW2_PLT_PCREL:
3203 case R_TILEGX_IMM16_X1_HW2_PLT_PCREL:
3204 case R_TILEGX_IMM16_X0_HW3_PLT_PCREL:
3205 case R_TILEGX_IMM16_X1_HW3_PLT_PCREL:
3206 case R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL:
3207 case R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL:
3208 case R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL:
3209 case R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL:
3210 case R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL:
3211 case R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL:
3212 /* Relocation is to the entry for this symbol in the
3213 procedure linkage table. */
3214 BFD_ASSERT (h != NULL);
3215
3216 if (h->plt.offset == (bfd_vma) -1 || htab->elf.splt == NULL)
3217 {
3218 /* We didn't make a PLT entry for this symbol. This
3219 happens when statically linking PIC code, or when
3220 using -Bsymbolic. */
3221 break;
3222 }
3223
3224 relocation = (htab->elf.splt->output_section->vma
3225 + htab->elf.splt->output_offset
3226 + h->plt.offset);
3227 unresolved_reloc = false;
3228 break;
3229
3230 case R_TILEGX_64_PCREL:
3231 case R_TILEGX_32_PCREL:
3232 case R_TILEGX_16_PCREL:
3233 case R_TILEGX_8_PCREL:
3234 case R_TILEGX_IMM16_X0_HW0_PCREL:
3235 case R_TILEGX_IMM16_X1_HW0_PCREL:
3236 case R_TILEGX_IMM16_X0_HW1_PCREL:
3237 case R_TILEGX_IMM16_X1_HW1_PCREL:
3238 case R_TILEGX_IMM16_X0_HW2_PCREL:
3239 case R_TILEGX_IMM16_X1_HW2_PCREL:
3240 case R_TILEGX_IMM16_X0_HW3_PCREL:
3241 case R_TILEGX_IMM16_X1_HW3_PCREL:
3242 case R_TILEGX_IMM16_X0_HW0_LAST_PCREL:
3243 case R_TILEGX_IMM16_X1_HW0_LAST_PCREL:
3244 case R_TILEGX_IMM16_X0_HW1_LAST_PCREL:
3245 case R_TILEGX_IMM16_X1_HW1_LAST_PCREL:
3246 case R_TILEGX_IMM16_X0_HW2_LAST_PCREL:
3247 case R_TILEGX_IMM16_X1_HW2_LAST_PCREL:
3248 if (h != NULL
3249 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3250 break;
3251 /* Fall through. */
3252 case R_TILEGX_64:
3253 case R_TILEGX_32:
3254 case R_TILEGX_16:
3255 case R_TILEGX_8:
3256 case R_TILEGX_HW0:
3257 case R_TILEGX_HW1:
3258 case R_TILEGX_HW2:
3259 case R_TILEGX_HW3:
3260 case R_TILEGX_HW0_LAST:
3261 case R_TILEGX_HW1_LAST:
3262 case R_TILEGX_HW2_LAST:
3263 case R_TILEGX_COPY:
3264 case R_TILEGX_GLOB_DAT:
3265 case R_TILEGX_JMP_SLOT:
3266 case R_TILEGX_RELATIVE:
3267 case R_TILEGX_BROFF_X1:
3268 case R_TILEGX_JUMPOFF_X1:
3269 case R_TILEGX_IMM8_X0:
3270 case R_TILEGX_IMM8_Y0:
3271 case R_TILEGX_IMM8_X1:
3272 case R_TILEGX_IMM8_Y1:
3273 case R_TILEGX_DEST_IMM8_X1:
3274 case R_TILEGX_MT_IMM14_X1:
3275 case R_TILEGX_MF_IMM14_X1:
3276 case R_TILEGX_MMSTART_X0:
3277 case R_TILEGX_MMEND_X0:
3278 case R_TILEGX_SHAMT_X0:
3279 case R_TILEGX_SHAMT_X1:
3280 case R_TILEGX_SHAMT_Y0:
3281 case R_TILEGX_SHAMT_Y1:
3282 case R_TILEGX_IMM16_X0_HW0:
3283 case R_TILEGX_IMM16_X1_HW0:
3284 case R_TILEGX_IMM16_X0_HW1:
3285 case R_TILEGX_IMM16_X1_HW1:
3286 case R_TILEGX_IMM16_X0_HW2:
3287 case R_TILEGX_IMM16_X1_HW2:
3288 case R_TILEGX_IMM16_X0_HW3:
3289 case R_TILEGX_IMM16_X1_HW3:
3290 case R_TILEGX_IMM16_X0_HW0_LAST:
3291 case R_TILEGX_IMM16_X1_HW0_LAST:
3292 case R_TILEGX_IMM16_X0_HW1_LAST:
3293 case R_TILEGX_IMM16_X1_HW1_LAST:
3294 case R_TILEGX_IMM16_X0_HW2_LAST:
3295 case R_TILEGX_IMM16_X1_HW2_LAST:
3296 if ((input_section->flags & SEC_ALLOC) == 0)
3297 break;
3298
3299 if ((bfd_link_pic (info)
3300 && (h == NULL
3301 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3302 && !resolved_to_zero)
3303 || h->root.type != bfd_link_hash_undefweak)
3304 && (! howto->pc_relative
3305 || !SYMBOL_CALLS_LOCAL (info, h)))
3306 || (!bfd_link_pic (info)
3307 && h != NULL
3308 && h->dynindx != -1
3309 && !h->non_got_ref
3310 && ((h->def_dynamic
3311 && !h->def_regular)
3312 || h->root.type == bfd_link_hash_undefweak
3313 || h->root.type == bfd_link_hash_undefined)))
3314 {
3315 Elf_Internal_Rela outrel;
3316 bool skip, relocate = false;
3317
3318 /* When generating a shared object, these relocations
3319 are copied into the output file to be resolved at run
3320 time. */
3321
3322 BFD_ASSERT (sreloc != NULL);
3323
3324 skip = false;
3325
3326 outrel.r_offset =
3327 _bfd_elf_section_offset (output_bfd, info, input_section,
3328 rel->r_offset);
3329 if (outrel.r_offset == (bfd_vma) -1)
3330 skip = true;
3331 else if (outrel.r_offset == (bfd_vma) -2)
3332 skip = true, relocate = true;
3333 outrel.r_offset += (input_section->output_section->vma
3334 + input_section->output_offset);
3335
3336 switch (r_type)
3337 {
3338 case R_TILEGX_64_PCREL:
3339 case R_TILEGX_32_PCREL:
3340 case R_TILEGX_16_PCREL:
3341 case R_TILEGX_8_PCREL:
3342 /* If the symbol is not dynamic, we should not keep
3343 a dynamic relocation. But an .rela.* slot has been
3344 allocated for it, output R_TILEGX_NONE.
3345 FIXME: Add code tracking needed dynamic relocs as
3346 e.g. i386 has. */
3347 if (h->dynindx == -1)
3348 skip = true, relocate = true;
3349 break;
3350 }
3351
3352 if (skip)
3353 memset (&outrel, 0, sizeof outrel);
3354 /* h->dynindx may be -1 if the symbol was marked to
3355 become local. */
3356 else if (h != NULL &&
3357 h->dynindx != -1
3358 && (! is_plt
3359 || !bfd_link_pic (info)
3360 || !SYMBOLIC_BIND (info, h)
3361 || !h->def_regular))
3362 {
3363 BFD_ASSERT (h->dynindx != -1);
3364 outrel.r_info = TILEGX_ELF_R_INFO (htab, rel, h->dynindx, r_type);
3365 outrel.r_addend = rel->r_addend;
3366 }
3367 else
3368 {
3369 if (r_type == R_TILEGX_32 || r_type == R_TILEGX_64)
3370 {
3371 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0,
3372 R_TILEGX_RELATIVE);
3373 outrel.r_addend = relocation + rel->r_addend;
3374 }
3375 else
3376 {
3377 long indx;
3378
3379 outrel.r_addend = relocation + rel->r_addend;
3380
3381 if (is_plt)
3382 sec = htab->elf.splt;
3383
3384 if (bfd_is_abs_section (sec))
3385 indx = 0;
3386 else if (sec == NULL || sec->owner == NULL)
3387 {
3388 bfd_set_error (bfd_error_bad_value);
3389 return false;
3390 }
3391 else
3392 {
3393 asection *osec;
3394
3395 /* We are turning this relocation into one
3396 against a section symbol. It would be
3397 proper to subtract the symbol's value,
3398 osec->vma, from the emitted reloc addend,
3399 but ld.so expects buggy relocs. */
3400 osec = sec->output_section;
3401 indx = elf_section_data (osec)->dynindx;
3402
3403 if (indx == 0)
3404 {
3405 osec = htab->elf.text_index_section;
3406 indx = elf_section_data (osec)->dynindx;
3407 }
3408
3409 /* FIXME: we really should be able to link non-pic
3410 shared libraries. */
3411 if (indx == 0)
3412 {
3413 BFD_FAIL ();
3414 _bfd_error_handler
3415 (_("%pB: probably compiled without -fPIC?"),
3416 input_bfd);
3417 bfd_set_error (bfd_error_bad_value);
3418 return false;
3419 }
3420 }
3421
3422 outrel.r_info = TILEGX_ELF_R_INFO (htab, rel, indx,
3423 r_type);
3424 }
3425 }
3426
3427 tilegx_elf_append_rela (output_bfd, sreloc, &outrel);
3428
3429 /* This reloc will be computed at runtime, so there's no
3430 need to do anything now. */
3431 if (! relocate)
3432 continue;
3433 }
3434 break;
3435
3436 case R_TILEGX_IMM16_X0_HW0_TLS_LE:
3437 case R_TILEGX_IMM16_X1_HW0_TLS_LE:
3438 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE:
3439 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE:
3440 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE:
3441 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE:
3442 if (!bfd_link_executable (info))
3443 {
3444 Elf_Internal_Rela outrel;
3445 bool skip;
3446
3447 BFD_ASSERT (sreloc != NULL);
3448 skip = false;
3449 outrel.r_offset =
3450 _bfd_elf_section_offset (output_bfd, info, input_section,
3451 rel->r_offset);
3452 if (outrel.r_offset == (bfd_vma) -1)
3453 skip = true;
3454 else if (outrel.r_offset == (bfd_vma) -2)
3455 skip = true;
3456 outrel.r_offset += (input_section->output_section->vma
3457 + input_section->output_offset);
3458 if (skip)
3459 memset (&outrel, 0, sizeof outrel);
3460 else
3461 {
3462 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0, r_type);
3463 outrel.r_addend = relocation - dtpoff_base (info)
3464 + rel->r_addend;
3465 }
3466
3467 tilegx_elf_append_rela (output_bfd, sreloc, &outrel);
3468 continue;
3469 }
3470 relocation = tpoff (info, relocation);
3471 break;
3472
3473 case R_TILEGX_IMM16_X0_HW0_TLS_GD:
3474 case R_TILEGX_IMM16_X1_HW0_TLS_GD:
3475 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
3476 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
3477 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
3478 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
3479 case R_TILEGX_IMM16_X0_HW0_TLS_IE:
3480 case R_TILEGX_IMM16_X1_HW0_TLS_IE:
3481 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
3482 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
3483 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
3484 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
3485 r_type = tilegx_elf_tls_transition (info, r_type, h == NULL,
3486 input_section->sec_flg0);
3487 tls_type = GOT_UNKNOWN;
3488 if (h == NULL && local_got_offsets)
3489 tls_type =
3490 _bfd_tilegx_elf_local_got_tls_type (input_bfd) [r_symndx];
3491 else if (h != NULL)
3492 {
3493 tls_type = tilegx_elf_hash_entry(h)->tls_type;
3494 if (bfd_link_executable (info)
3495 && h->dynindx == -1
3496 && tls_type == GOT_TLS_IE)
3497 r_type = (!input_section->sec_flg0
3498 ? tilegx_tls_translate_to_le (r_type)
3499 : tilegx_tls_translate_to_ie (r_type));
3500 }
3501
3502 if (tls_type == GOT_TLS_IE)
3503 r_type = tilegx_tls_translate_to_ie (r_type);
3504
3505 if (r_type == R_TILEGX_IMM16_X0_HW0_TLS_LE
3506 || r_type == R_TILEGX_IMM16_X1_HW0_TLS_LE
3507 || r_type == R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE
3508 || r_type == R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE
3509 || r_type == R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE
3510 || r_type == R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE)
3511 {
3512 relocation = tpoff (info, relocation);
3513 break;
3514 }
3515
3516 if (h != NULL)
3517 {
3518 off = h->got.offset;
3519 h->got.offset |= 1;
3520 }
3521 else
3522 {
3523 BFD_ASSERT (local_got_offsets != NULL);
3524 off = local_got_offsets[r_symndx];
3525 local_got_offsets[r_symndx] |= 1;
3526 }
3527
3528 if (htab->elf.sgot == NULL)
3529 abort ();
3530
3531 if ((off & 1) != 0)
3532 off &= ~1;
3533 else
3534 {
3535 Elf_Internal_Rela outrel;
3536 int indx = 0;
3537 bool need_relocs = false;
3538
3539 if (htab->elf.srelgot == NULL)
3540 abort ();
3541
3542 if (h != NULL)
3543 {
3544 bool dyn;
3545 dyn = htab->elf.dynamic_sections_created;
3546
3547 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3548 bfd_link_pic (info),
3549 h)
3550 && (!bfd_link_pic (info)
3551 || !SYMBOL_REFERENCES_LOCAL (info, h)))
3552 {
3553 indx = h->dynindx;
3554 }
3555 }
3556
3557 /* The GOT entries have not been initialized yet. Do it
3558 now, and emit any relocations. */
3559 if ((bfd_link_pic (info) || indx != 0)
3560 && (h == NULL
3561 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3562 || h->root.type != bfd_link_hash_undefweak))
3563 need_relocs = true;
3564
3565 switch (r_type)
3566 {
3567 case R_TILEGX_IMM16_X0_HW0_TLS_IE:
3568 case R_TILEGX_IMM16_X1_HW0_TLS_IE:
3569 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
3570 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
3571 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
3572 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
3573 if (need_relocs) {
3574 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0,
3575 htab->elf.sgot->contents + off);
3576 outrel.r_offset = (htab->elf.sgot->output_section->vma
3577 + htab->elf.sgot->output_offset + off);
3578 outrel.r_addend = 0;
3579 if (indx == 0)
3580 outrel.r_addend = relocation - dtpoff_base (info);
3581 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx,
3582 TILEGX_ELF_TPOFF_RELOC (htab));
3583 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel);
3584 } else {
3585 TILEGX_ELF_PUT_WORD (htab, output_bfd,
3586 tpoff (info, relocation),
3587 htab->elf.sgot->contents + off);
3588 }
3589 break;
3590
3591 case R_TILEGX_IMM16_X0_HW0_TLS_GD:
3592 case R_TILEGX_IMM16_X1_HW0_TLS_GD:
3593 case R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
3594 case R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
3595 case R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
3596 case R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
3597 if (need_relocs) {
3598 outrel.r_offset = (htab->elf.sgot->output_section->vma
3599 + htab->elf.sgot->output_offset + off);
3600 outrel.r_addend = 0;
3601 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx,
3602 TILEGX_ELF_DTPMOD_RELOC (htab));
3603 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0,
3604 htab->elf.sgot->contents + off);
3605 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel);
3606 if (indx == 0)
3607 {
3608 BFD_ASSERT (! unresolved_reloc);
3609 TILEGX_ELF_PUT_WORD (htab, output_bfd,
3610 relocation - dtpoff_base (info),
3611 (htab->elf.sgot->contents + off +
3612 TILEGX_ELF_WORD_BYTES (htab)));
3613 }
3614 else
3615 {
3616 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0,
3617 (htab->elf.sgot->contents + off +
3618 TILEGX_ELF_WORD_BYTES (htab)));
3619 outrel.r_info = TILEGX_ELF_R_INFO (htab, NULL, indx,
3620 TILEGX_ELF_DTPOFF_RELOC (htab));
3621 outrel.r_offset += TILEGX_ELF_WORD_BYTES (htab);
3622 tilegx_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel);
3623 }
3624 }
3625
3626 else {
3627 /* If we are not emitting relocations for a
3628 general dynamic reference, then we must be in a
3629 static link or an executable link with the
3630 symbol binding locally. Mark it as belonging
3631 to module 1, the executable. */
3632 TILEGX_ELF_PUT_WORD (htab, output_bfd, 1,
3633 htab->elf.sgot->contents + off );
3634 TILEGX_ELF_PUT_WORD (htab, output_bfd,
3635 relocation - dtpoff_base (info),
3636 htab->elf.sgot->contents + off +
3637 TILEGX_ELF_WORD_BYTES (htab));
3638 }
3639 break;
3640 }
3641 }
3642
3643 if (off >= (bfd_vma) -2)
3644 abort ();
3645
3646 relocation = off - got_base;
3647 unresolved_reloc = false;
3648 howto = tilegx_elf_howto_table + r_type;
3649 break;
3650
3651 default:
3652 break;
3653 }
3654
3655 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3656 because such sections are not SEC_ALLOC and thus ld.so will
3657 not process them. */
3658 if (unresolved_reloc
3659 && !((input_section->flags & SEC_DEBUGGING) != 0
3660 && h->def_dynamic)
3661 && _bfd_elf_section_offset (output_bfd, info, input_section,
3662 rel->r_offset) != (bfd_vma) -1)
3663 _bfd_error_handler
3664 /* xgettext:c-format */
3665 (_("%pB(%pA+%#" PRIx64 "): "
3666 "unresolvable %s relocation against symbol `%s'"),
3667 input_bfd,
3668 input_section,
3669 (uint64_t) rel->r_offset,
3670 howto->name,
3671 h->root.root.string);
3672
3673 r = bfd_reloc_continue;
3674
3675 /* Get the operand creation function, if any. */
3676 create_func = reloc_to_create_func[r_type];
3677 if (create_func == NULL)
3678 {
3679 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3680 contents, rel->r_offset,
3681 relocation, rel->r_addend);
3682 }
3683 else
3684 {
3685 if (howto->pc_relative)
3686 {
3687 relocation -=
3688 input_section->output_section->vma + input_section->output_offset;
3689 if (howto->pcrel_offset)
3690 relocation -= rel->r_offset;
3691 }
3692
3693 bfd_byte *data;
3694
3695 /* Add the relocation addend if any to the final target value */
3696 relocation += rel->r_addend;
3697
3698 /* Do basic range checking */
3699 r = bfd_check_overflow (howto->complain_on_overflow,
3700 howto->bitsize,
3701 howto->rightshift,
3702 TILEGX_ELF_WORD_BYTES (htab) * 8,
3703 relocation);
3704
3705 /*
3706 * Write the relocated value out into the raw section data.
3707 * Don't put a relocation out in the .rela section.
3708 */
3709 tilegx_bundle_bits mask = create_func(-1);
3710 tilegx_bundle_bits value = create_func(relocation >> howto->rightshift);
3711
3712 /* Only touch bytes while the mask is not 0, so we
3713 don't write to out of bounds memory if this is actually
3714 a 16-bit switch instruction. */
3715 for (data = contents + rel->r_offset; mask != 0; data++)
3716 {
3717 bfd_byte byte_mask = (bfd_byte)mask;
3718 *data = (*data & ~byte_mask) | ((bfd_byte)value & byte_mask);
3719 mask >>= 8;
3720 value >>= 8;
3721 }
3722 }
3723
3724 if (r != bfd_reloc_ok)
3725 {
3726 const char *msg = NULL;
3727
3728 switch (r)
3729 {
3730 case bfd_reloc_overflow:
3731 (*info->callbacks->reloc_overflow)
3732 (info, (h ? &h->root : NULL), name, howto->name,
3733 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3734 break;
3735
3736 case bfd_reloc_undefined:
3737 (*info->callbacks->undefined_symbol)
3738 (info, name, input_bfd, input_section, rel->r_offset, true);
3739 break;
3740
3741 case bfd_reloc_outofrange:
3742 msg = _("internal error: out of range error");
3743 break;
3744
3745 case bfd_reloc_notsupported:
3746 msg = _("internal error: unsupported relocation error");
3747 break;
3748
3749 case bfd_reloc_dangerous:
3750 msg = _("internal error: dangerous relocation");
3751 break;
3752
3753 default:
3754 msg = _("internal error: unknown error");
3755 break;
3756 }
3757
3758 if (msg)
3759 (*info->callbacks->warning) (info, msg, name, input_bfd,
3760 input_section, rel->r_offset);
3761 }
3762 }
3763
3764 return true;
3765 }
3766
3767 /* Finish up dynamic symbol handling. We set the contents of various
3768 dynamic sections here. */
3769
3770 bool
tilegx_elf_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)3771 tilegx_elf_finish_dynamic_symbol (bfd *output_bfd,
3772 struct bfd_link_info *info,
3773 struct elf_link_hash_entry *h,
3774 Elf_Internal_Sym *sym)
3775 {
3776 struct tilegx_elf_link_hash_table *htab;
3777
3778 htab = tilegx_elf_hash_table (info);
3779 BFD_ASSERT (htab != NULL);
3780
3781 if (h->plt.offset != (bfd_vma) -1)
3782 {
3783 asection *splt;
3784 asection *srela;
3785 asection *sgotplt;
3786 Elf_Internal_Rela rela;
3787 bfd_byte *loc;
3788 bfd_vma r_offset;
3789 const struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
3790
3791
3792 int rela_index;
3793
3794 /* This symbol has an entry in the PLT. Set it up. */
3795
3796 BFD_ASSERT (h->dynindx != -1);
3797
3798 splt = htab->elf.splt;
3799 srela = htab->elf.srelplt;
3800 sgotplt = htab->elf.sgotplt;
3801
3802 if (splt == NULL || srela == NULL)
3803 abort ();
3804
3805 /* Fill in the entry in the procedure linkage table. */
3806 rela_index = tilegx_plt_entry_build (output_bfd, htab, splt, sgotplt,
3807 h->plt.offset, &r_offset);
3808
3809 /* Fill in the entry in the global offset table, which initially points
3810 to the beginning of the plt. */
3811 TILEGX_ELF_PUT_WORD (htab, output_bfd,
3812 splt->output_section->vma + splt->output_offset,
3813 sgotplt->contents + r_offset);
3814
3815 /* Fill in the entry in the .rela.plt section. */
3816 rela.r_offset = (sgotplt->output_section->vma
3817 + sgotplt->output_offset
3818 + r_offset);
3819 rela.r_addend = 0;
3820 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_JMP_SLOT);
3821
3822 loc = srela->contents + rela_index * TILEGX_ELF_RELA_BYTES (htab);
3823 bed->s->swap_reloca_out (output_bfd, &rela, loc);
3824
3825 if (!h->def_regular)
3826 {
3827 /* Mark the symbol as undefined, rather than as defined in
3828 the .plt section. Leave the value alone. */
3829 sym->st_shndx = SHN_UNDEF;
3830 /* If the symbol is weak, we do need to clear the value.
3831 Otherwise, the PLT entry would provide a definition for
3832 the symbol even if the symbol wasn't defined anywhere,
3833 and so the symbol would never be NULL. */
3834 if (!h->ref_regular_nonweak)
3835 sym->st_value = 0;
3836 }
3837 }
3838
3839 if (h->got.offset != (bfd_vma) -1
3840 && tilegx_elf_hash_entry(h)->tls_type != GOT_TLS_GD
3841 && tilegx_elf_hash_entry(h)->tls_type != GOT_TLS_IE)
3842 {
3843 asection *sgot;
3844 asection *srela;
3845 Elf_Internal_Rela rela;
3846
3847 /* This symbol has an entry in the GOT. Set it up. */
3848
3849 sgot = htab->elf.sgot;
3850 srela = htab->elf.srelgot;
3851 BFD_ASSERT (sgot != NULL && srela != NULL);
3852
3853 rela.r_offset = (sgot->output_section->vma
3854 + sgot->output_offset
3855 + (h->got.offset &~ (bfd_vma) 1));
3856
3857 /* If this is a -Bsymbolic link, and the symbol is defined
3858 locally, we just want to emit a RELATIVE reloc. Likewise if
3859 the symbol was forced to be local because of a version file.
3860 The entry in the global offset table will already have been
3861 initialized in the relocate_section function. */
3862 if (bfd_link_pic (info)
3863 && (info->symbolic || h->dynindx == -1)
3864 && h->def_regular)
3865 {
3866 asection *sec = h->root.u.def.section;
3867 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, 0, R_TILEGX_RELATIVE);
3868 rela.r_addend = (h->root.u.def.value
3869 + sec->output_section->vma
3870 + sec->output_offset);
3871 }
3872 else
3873 {
3874 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_GLOB_DAT);
3875 rela.r_addend = 0;
3876 }
3877
3878 TILEGX_ELF_PUT_WORD (htab, output_bfd, 0,
3879 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
3880 tilegx_elf_append_rela (output_bfd, srela, &rela);
3881 }
3882
3883 if (h->needs_copy)
3884 {
3885 asection *s;
3886 Elf_Internal_Rela rela;
3887
3888 /* This symbols needs a copy reloc. Set it up. */
3889 BFD_ASSERT (h->dynindx != -1);
3890
3891 if (h->root.u.def.section == htab->elf.sdynrelro)
3892 s = htab->elf.sreldynrelro;
3893 else
3894 s = htab->elf.srelbss;
3895 BFD_ASSERT (s != NULL);
3896
3897 rela.r_offset = (h->root.u.def.value
3898 + h->root.u.def.section->output_section->vma
3899 + h->root.u.def.section->output_offset);
3900 rela.r_info = TILEGX_ELF_R_INFO (htab, NULL, h->dynindx, R_TILEGX_COPY);
3901 rela.r_addend = 0;
3902 tilegx_elf_append_rela (output_bfd, s, &rela);
3903 }
3904
3905 /* Mark some specially defined symbols as absolute. */
3906 if (h == htab->elf.hdynamic
3907 || (h == htab->elf.hgot || h == htab->elf.hplt))
3908 sym->st_shndx = SHN_ABS;
3909
3910 return true;
3911 }
3912
3913 /* Finish up the dynamic sections. */
3914
3915 static bool
tilegx_finish_dyn(bfd * output_bfd,struct bfd_link_info * info,bfd * dynobj,asection * sdyn,asection * splt ATTRIBUTE_UNUSED)3916 tilegx_finish_dyn (bfd *output_bfd, struct bfd_link_info *info,
3917 bfd *dynobj, asection *sdyn,
3918 asection *splt ATTRIBUTE_UNUSED)
3919 {
3920 struct tilegx_elf_link_hash_table *htab;
3921 const struct elf_backend_data *bed;
3922 bfd_byte *dyncon, *dynconend;
3923 size_t dynsize;
3924
3925 htab = tilegx_elf_hash_table (info);
3926 BFD_ASSERT (htab != NULL);
3927 bed = get_elf_backend_data (output_bfd);
3928 dynsize = bed->s->sizeof_dyn;
3929 dynconend = sdyn->contents + sdyn->size;
3930
3931 for (dyncon = sdyn->contents; dyncon < dynconend; dyncon += dynsize)
3932 {
3933 Elf_Internal_Dyn dyn;
3934 asection *s;
3935
3936 bed->s->swap_dyn_in (dynobj, dyncon, &dyn);
3937
3938 switch (dyn.d_tag)
3939 {
3940 case DT_PLTGOT:
3941 s = htab->elf.sgotplt;
3942 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3943 break;
3944 case DT_JMPREL:
3945 s = htab->elf.srelplt;
3946 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3947 break;
3948 case DT_PLTRELSZ:
3949 s = htab->elf.srelplt;
3950 dyn.d_un.d_val = s->size;
3951 break;
3952 default:
3953 continue;
3954 }
3955
3956 bed->s->swap_dyn_out (output_bfd, &dyn, dyncon);
3957 }
3958 return true;
3959 }
3960
3961 bool
tilegx_elf_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)3962 tilegx_elf_finish_dynamic_sections (bfd *output_bfd,
3963 struct bfd_link_info *info)
3964 {
3965 bfd *dynobj;
3966 asection *sdyn;
3967 struct tilegx_elf_link_hash_table *htab;
3968 size_t pad_size;
3969
3970 htab = tilegx_elf_hash_table (info);
3971 BFD_ASSERT (htab != NULL);
3972 dynobj = htab->elf.dynobj;
3973
3974 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3975
3976 if (elf_hash_table (info)->dynamic_sections_created)
3977 {
3978 asection *splt;
3979 bool ret;
3980
3981 splt = htab->elf.splt;
3982 BFD_ASSERT (splt != NULL && sdyn != NULL);
3983
3984 ret = tilegx_finish_dyn (output_bfd, info, dynobj, sdyn, splt);
3985
3986 if (!ret)
3987 return ret;
3988
3989 /* Fill in the head and tail entries in the procedure linkage table. */
3990 if (splt->size > 0)
3991 {
3992 memcpy (splt->contents,
3993 ABI_64_P (output_bfd) ?
3994 tilegx64_plt0_entry : tilegx32_plt0_entry,
3995 PLT_HEADER_SIZE);
3996
3997 memcpy (splt->contents + splt->size
3998 - PLT_ENTRY_SIZE + PLT_HEADER_SIZE,
3999 ABI_64_P (output_bfd) ?
4000 tilegx64_plt_tail_entry : tilegx32_plt_tail_entry,
4001 PLT_TAIL_SIZE);
4002 /* Add padding so that the plt section is a multiple of its
4003 entry size. */
4004 pad_size = PLT_ENTRY_SIZE - PLT_HEADER_SIZE - PLT_TAIL_SIZE;
4005 memset (splt->contents + splt->size - pad_size, 0, pad_size);
4006
4007 elf_section_data (splt->output_section)->this_hdr.sh_entsize
4008 = PLT_ENTRY_SIZE;
4009 }
4010 }
4011
4012 if (htab->elf.sgotplt)
4013 {
4014 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4015 {
4016 _bfd_error_handler
4017 (_("discarded output section: `%pA'"), htab->elf.sgotplt);
4018 return false;
4019 }
4020
4021 if (htab->elf.sgotplt->size > 0)
4022 {
4023 /* Write the first two entries in .got.plt, needed for the dynamic
4024 linker. */
4025 TILEGX_ELF_PUT_WORD (htab, output_bfd, (bfd_vma) -1,
4026 htab->elf.sgotplt->contents);
4027 TILEGX_ELF_PUT_WORD (htab, output_bfd, (bfd_vma) 0,
4028 htab->elf.sgotplt->contents
4029 + GOT_ENTRY_SIZE (htab));
4030
4031 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
4032 GOT_ENTRY_SIZE (htab);
4033 }
4034 }
4035
4036 if (htab->elf.sgot)
4037 {
4038 if (htab->elf.sgot->size > 0)
4039 {
4040 /* Set the first entry in the global offset table to the address of
4041 the dynamic section. */
4042 bfd_vma val = (sdyn ?
4043 sdyn->output_section->vma + sdyn->output_offset :
4044 0);
4045 TILEGX_ELF_PUT_WORD (htab, output_bfd, val,
4046 htab->elf.sgot->contents);
4047
4048 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize =
4049 GOT_ENTRY_SIZE (htab);
4050 }
4051 }
4052
4053 return true;
4054 }
4055
4056
4057
4058 /* Return address for Ith PLT stub in section PLT, for relocation REL
4059 or (bfd_vma) -1 if it should not be included. */
4060
4061 bfd_vma
tilegx_elf_plt_sym_val(bfd_vma i,const asection * plt,const arelent * rel ATTRIBUTE_UNUSED)4062 tilegx_elf_plt_sym_val (bfd_vma i, const asection *plt,
4063 const arelent *rel ATTRIBUTE_UNUSED)
4064 {
4065 return plt->vma + PLT_HEADER_SIZE + i * PLT_ENTRY_SIZE;
4066 }
4067
4068 enum elf_reloc_type_class
tilegx_reloc_type_class(const struct bfd_link_info * info ATTRIBUTE_UNUSED,const asection * rel_sec ATTRIBUTE_UNUSED,const Elf_Internal_Rela * rela)4069 tilegx_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4070 const asection *rel_sec ATTRIBUTE_UNUSED,
4071 const Elf_Internal_Rela *rela)
4072 {
4073 switch ((int) TILEGX_ELF_R_TYPE (rela->r_info))
4074 {
4075 case R_TILEGX_RELATIVE:
4076 return reloc_class_relative;
4077 case R_TILEGX_JMP_SLOT:
4078 return reloc_class_plt;
4079 case R_TILEGX_COPY:
4080 return reloc_class_copy;
4081 default:
4082 return reloc_class_normal;
4083 }
4084 }
4085
4086 int
tilegx_additional_program_headers(bfd * abfd,struct bfd_link_info * info ATTRIBUTE_UNUSED)4087 tilegx_additional_program_headers (bfd *abfd,
4088 struct bfd_link_info *info ATTRIBUTE_UNUSED)
4089 {
4090 /* Each .intrpt section specified by the user adds another PT_LOAD
4091 header since the sections are discontiguous. */
4092 static const char intrpt_sections[4][9] =
4093 {
4094 ".intrpt0", ".intrpt1", ".intrpt2", ".intrpt3"
4095 };
4096 int count = 0;
4097 int i;
4098
4099 for (i = 0; i < 4; i++)
4100 {
4101 asection *sec = bfd_get_section_by_name (abfd, intrpt_sections[i]);
4102 if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
4103 ++count;
4104 }
4105
4106 /* Add four "padding" headers in to leave room in case a custom linker
4107 script does something fancy. Otherwise ld complains that it ran
4108 out of program headers and refuses to link. */
4109 count += 4;
4110
4111 return count;
4112 }
4113
4114
4115 bool
_bfd_tilegx_elf_merge_private_bfd_data(bfd * ibfd,struct bfd_link_info * info)4116 _bfd_tilegx_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4117 {
4118 bfd *obfd = info->output_bfd;
4119 const char *targ1 = bfd_get_target (ibfd);
4120 const char *targ2 = bfd_get_target (obfd);
4121
4122 if (strcmp (targ1, targ2) != 0)
4123 {
4124 _bfd_error_handler
4125 /* xgettext:c-format */
4126 (_("%pB: cannot link together %s and %s objects"),
4127 ibfd, targ1, targ2);
4128 bfd_set_error (bfd_error_bad_value);
4129 return false;
4130 }
4131
4132 return true;
4133 }
4134